河南天一大联考高二阶段性测试(一) 英语含答案
天一大联考
2020－2021学年高二年级阶段性测试(一)
英语
考生注意：
1.答题前考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。
2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。
3.考试结束后，将本试卷和答题卡一并交回。
第一部分听力(共两节，满分30分)
做题时，先将答案标在试卷上，录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。
第一节(共5小题；每小题1.5分，满分7.5分)
听下面5段对话，每段对话后有一个小题。从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。
例: How much is the shirt?
A.￡19.15.
B.￡9.18.
C.￡9.15.
答案是C。
1. What does the woman want the boy to do?
A. Read a story.
B. Go to bed.
C. Take a bath.
2. When will the speakers hold a party?
A. On Friday night.
B. On Saturday night.
C. On Sunday night.
3. What did the woman do today?
A. She kept at home.
B. She stayed with some kids.
C. She went to the bookstore.
4. What are the speakers talking about?
A. A fire.
B. An earthquake.
C. A car accident.
5. What will the woman do tonight?
A. Buy a calendar.
B. Have a meeting.
C. Attend a party.
第二节(共15小题，每小题1.5分，满分22.5分)
听下面5段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项。听每段对话或独白前，你将有时间阅读各个小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间。每段对话或独白读两遍。
听第6段材料，回答第6、7题。
6. Where will the speakers stop their car?
A. Near the store.
B. Near the factory.
C. At the park.
7. What's wrong with the car?
A. It can't be started.
B. It has run out of water.
C. It needs a new motor.
听第7段材料，回答第8、9题。
8. What happened to the boy?
A. He was hit by a car.
B. He hit a bus with his car.
C. He hurt his leg in an accident.
9. Wha t’s the man doing probably?
A. Making an apology.
B. Asking for details.
C. Looking after patients.
听第8段材料，回答第10至12题。
10. What does the man want to be?
A. A policeman.
B. A doctor.
C. A secretary.
11. How many people failed in the first interview?
A. Sixteen.
B. Fourteen.
C. Twenty.
12. Who wants the man to find a job in their hometown?
A. His mother.
B. His wife.
C. His father.
听第9段材料，回答第13至16题。
13. What does Mike like doing?
A. Swimming.
B. Traveling.
C. Boating.
14. What does Alike invite Tom to do?
A. Go to a party.
B. Attend a meeting.
C. Spend a holiday with him.
15. Why does Sally do many part-time jobs?
A. To earn money for a trip.
B. To earn money for her tuition.
C. To get more working experience.
16. What’s the woman’s suggestion?
A. Going out with Sally.
B. Asking for Sally’s advice.
C. Telling Mike about the plan.
听第10段材料，回答第17至20题。
17. Who can take part in the competition?
A. Students.
B. Workers.
C. Painters.
18. What was the topic of the competition last year?
A. Future.
B. Environment.
C. Fighting against drugs.
19. How can participants hand in their paintings?
A. By handing in them to their teachers.
B. By sending them to the speaker.
C. By putting them in a box.
20. What is the third prize?
A. Library cards.
B. Mountain bikes.
C. Books.
第二部分阅读理解(共两节，满分40分)
第一节(共15小题；每小题2分，满分30分)
阅读下列短文，从每题所给的四个选项(A、B、C、和D)中，选出最佳选项，并在答题卡上将该项涂黑。
A
Here are some of the top writing contests for those who are interested in writing.
Young Lions Fiction Award
Award amount(金额): $ 5.000
Deadline: Usually in September
Fee: Free
The Young Lions Fiction Award was created for the next generation of fiction writers. Five finalists are recognized, with one taking home the grand prize of $ 5, 000. To qualify, the author must be 35 or younger and submit (提交) a novel or a collection of short stories.
Ocean Awareness Contest
Award amount: Scholarships tip to$10, 000
Deadline: December 15, 2020
Fee: Free
The Ocean Awareness Contest aims to recognize writers while raising awareness about the climate crisis. You can submit visual art, film, music, poetry, or multimedia pieces. You can even submit as a club, class or group if you want.
Lewis Center Play Contest
Award amount: $100 to $500
Deadline: March 31 each year
Fee: Free
Anyone can submit a 10-minute play in the Lewis Center Ten-Minute Play Contest. The play can be at most 10 pages and can be of any topic. The plays will be judged by Princeton University faculty members.
53-Word Story Contest
Award amount: $1, 000 to be used towards your higher education
Deadline: 21st of each month
Fee: Free
In the contest hosted by Prime Number Magazine and Press 53, writers are put to the test and have to respond to a prompt(提示)with a 53-word story. The responses must be 53 words exactly-no more and no less. Only stories-i. e. no poems-are permitted, and only one submission per writer is allowed.
21. What's special about the Young Lions Fiction Award?
A. It's free of charge.
B. It offers the biggest prize.
C. It takes place on a yearly basis.
D. It sets a limit on the authors' age.
22. What challenges the writers at the 53-Word Story Contest?
A. Time length.
B. Speed.
C. Memory.
D. Word number.
23. Which event directs our attention to climate change?
A. 53-Word Story Contest.
B. Young Lions Fiction Award.
C. Ocean Awareness Contest.
D. Lewis Center Play Contest.
B
Gym class was not considered important at the private school I attended from kindergarten to Grade 6 and the words "movement skill development" would have caused brows to wrinkle.
For Grades 7 and 8 I moved into the public school system. It was the early 1980s and we had to
wear green gym shorts and white T-shirts with the school crest(饰章)on them. We had to climb ropes. We had to go for 1ong runs in the valley beside the school and excuses were not allowed.
My mom, also somewhat of a "non-sporty mom", wrote me notes to get me out of this nightmare once a month. And when she didn't, I sometimes forged my own. One day I arrived for gym class with my note explaining why I could not participate. It was signed by my "mother". There were at least two classes of Grade 8 girls sitting on the side of the hill when I boldly(冒失地) presented my note. The PE teacher asked me why my mother's signature looked so messy. What I said next might be the finest example of just how stupid I was when I was13: "It's messy because she signed it while she was driving."
My classmates giggled(傻笑) nervously. I thought maybe I had pushed things too far but wasn't at all prepared for what happened next. The teacher grabbed my ear and dragged me all the way up the millions of stairs, through the miles of hallways, and into the principal's office. That was where my memories from junior high gym class ended.
The next year I went to the first day of Grade 9 gym with a positive outlook, high hopes, and good intentions. But all I ended up developing was the habit of hiding in the girls' bathroom for the duration of the class.
When my counsellor(辅导员) called a meeting between me and the gym teacher later that year, I remember the teacher looking at me and saying, "I wouldn't know this girl was in my class if I hit her with my car."
24. What is the author's impression of her gym class?
A. It was great fun before Grade 6.
B. It was dull and terrible all the way.
C. It helped her improve sports skills.
D. It was tiring but interesting at public school.
25. Which can replace the underlined word "forged" in paragraph 3?
A. improved
B. gathered
C. created
D. discovered
26. Why was the author punished by her PE teacher at age 13?
A. She told a lie to the teacher.
B. She had an argument with others.
C. She made the same mistake repeatedly.
D. She was too careless in signing her name.
27. When did the author’s attitude to gym class change for the better?
A. At the beginning of Grade 9.
B. In the early eighties.
C. In the middle of Grade 8.
D. During Grades 7 and 8.
C
After living, studying and traveling in Rome for over nine months, I finally flew back "across the pond" to America. While the reunion with my friends and family was unbelievable, I began to feel the so-called "reverse (反向的)culture shock".
Before experiencing any psychological distress(忧虑)upon re-entry, I noticed all of the obvious physical and cultural differences between Italy and Indiana-one of which occurred in Walmart. As I walked down the seemingly endless aisles, I was confused. When I finally found the cream cheese, I just stopped and stare. "Is it really necessary to sell over ten different flavors of the same product?" I thought. 1 immediately recalled the small grocery store, Carrefour, a block away from the Rome Global Gateway. While the store was small compared to Walmart, it still sold everything I ever wanted. It seemed that Walmart is a perfect example of over-indulgence(放纵)and materialism, two known negative qualities of American culture.
Because I struggled to communicate with the locals of Rome, who spoke very little English, I was unexpectedly pleased to have the ability to talk to anyone once again. Personally, I have never been the type to strike up conversation with strangers, yet I found myself enjoying conversation with others I hadn’t met before in public. It feels good to no longer be the "outsider" walking on eggshells so as not to offend anyone or say something with the wrong accent or incorrect grammar.
While attending a Student Safety Summit for Notre Dame students traveling abroad, one of the speakers noted that living in a foreign country will "change you in ways you can't even imagine yet," including the way you interact with others, how you dress, what you eat, and how you perceive(感知)the world. Before living abroad, I thought to myself that nothing could influence my sense of identity, let alone the way I dress! However, those words have stuck with me, and I believe the speaker was right!
28. What puzzled the author at Walmart?
A. It was not selling a common product.
B. Its cream cheese had a terrible flavor.
C. It was located very close to its competitor.
D. It was unnecessarily rich in product varieties.
29. According to paragraph 2, what's the author's attitude towards American culture?
A. Proud.
B. Curious.
C. Unsupportive.
D. Uninterested.
30. Before coming to Rome, the author was used to .
A. speaking with an accent
B. not talking to strangers
C. keeping his identity secret
D. correcting others’ grammar
31. What is the best title for the text?
A. How to Prepare for Culture Shock
B. Keeping Your Identity During Travel
C. Dealing with Reverse Culture Shock
D. How to Follow Foreign Customs as You Travel
D
People and other great apes are known for their willingness to help others in need, even strangers. Now, researchers have shown for the first time that some birds-specifically African grey parrots-are similarly helpful.
"We found that African grey parrots voluntarily help familiar parrots to achieve a goal, without obvious immediate benefit to themselves," says Desiree Brucks of the Max Planck Institute for Birds Study, Germany.
Parrots and crows are known for having large brains relative to the size of their bodies and problem-solving skills to match. For that reason, they are sometimes considered to be“feathered apes," explains Brucks. However, earlier studies showed that, despite(尽管)their impressive social intelligence, crows don't help other crows. In their new study, Brucks and his fellows wondered: what about parrots?
To find out, they placed pairs of grey parrots and blue-headed parrots in boxes alongside each other with a transfer(转移)hole between the two, and a hole facing a human experimenter that was either kept open or closed. Both parrot species quickly learned that they could exchange tokens(筹码)with the experimenter for a nut treat-but only the grey parrots helped their neighbors when their own hole facing the scientist was closed, preventing them from gaining any personal reward.
In the very first round, seven out of eight grey parrots were willing to transfer tokens in their possession to their neighbors so that their friends could feast when they could not. The fact that they did so without knowing they would later be tested in the other role showed that those giving were not expecting the favor to be rewarded, said Brucks.
Significantly, the grey parrots appeared to understand the nature of the task, instead of acting out of playfulness. When they saw the other parrot had an opportunity for exchange, they'd pass a token over-but otherwise, they would not. And, like humans, the grey parrots appeared to favor their friends, sharing more tokens with birds they had previously closely associated with, though they still gave some to those they are familiar with.
32. Parrots are considered "feathered apes" mainly due to .
A. their brain size
B. their body structure
C. their language skills
D. their intelligence level
33. What's the purpose of Brucks' new study?
A. To learn how parrots take on their tasks.
B. To discover whether parrots are helpful.
C. To prove parrots are socially active birds.
D. To find out links between apes and crows.
34. What’s the use of a "transfer hole" in the experiment?
A. Parrots passed their tokens through it.
B. Parrots got their rewards through it.
C. Researchers exchanged tokens through it.
D. Researchers fed the parrots through it.
35. What can we infer about grey parrots from the last paragraph?
A. They are naturally interested in playful tasks.
B. They rarely build friendship with their neighbors.
C. They use tokens to get favors from their neighbors.
D. They are more likely to help their friends if possible.
第二节(共5小题；每小题2分，满分10分)
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
Alternative energy is becoming popular in many homes. Solar systems are being set up to heat water and provide energy, 36 . In addition to saving energy, you will also save a lot of costs and keep your energy bill lower. Solar water heaters can be placed on the roof, while most wind systems are placed on the ground.
37 . Rain water can be collected and used in the garden and lawn, and recycled water from showers and sinks can be used in the garden as well. You can also buy a low flow toilet as they help to reduce water waste.
When cleaning inside the home you can use cleaning products that are eco-friendly, and reduce the amount of chemicals that are released in the environment. 38 , as it is not bio-degradable(生物可降解的)and has a negative impact on the environment.
There are many things that you can do to reduce the impact on the environment when building a home. 39 , but it can also reduce your monthly electricity bill, which is why more and more builders are starting to use these methods. By building an eco-friendly home and living a greener
lifestyle, you will help to reduce the impact that humans have on nature, and allow the environment to be protected as much as possible. Who knows, you might influence other people in your neighbourhood and encourage them to “green up” their homes and lifestyles.
40 . Many small changes do make a big difference, though.
A. There are simple and easy ways to do it
B. Try to avoid using plastic when possible
C. Water management is extremely important
D. People are also starting to use wind systems
E. Greener living is not only environmentally friendly
F. Not everyone can make big changes to their lifestyles
G. You end up with a home that rises above your expectations
第三部分语言知识运用(共两节，满分45分)
第一节(共20小题；每小题1.5分，满分30分)
阅读下面短文，从短文后各题所给的A、B、C和D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。
A doctor is praising a Minnesota state police who stopped her for speeding, but gave her N95 masks instead of a 41 . Dr. Janjua thanked State Police Brian J Schwartz for his act of 42 during the coronavirus pandemic in a Facebook post.
Dr. Janjua, a doctor 43 in the area, explained she was 44 after driving over the speed limit on March 21.Police Schwartz told her it was irresponsible for her to be 45 because it would take up resources if she got into a(n) 46 and she would not be able to help her 47 . She waited for him to write a ticket, but to her 48 , he let her off with a 49 warning-plus five medical masks. They came from a supply that the state had given him for his own 50 .
"I 51 at once," she said. "Maybe it's just because of the cold weather, and I also saw him shed(流出)a few tears, before 52 me well and walking away."
Like many of her fellow health care workers, Dr. Janjua said she had been feeling 53 for not having proper protective equipment and worried about what would 54 if she fell sick far from home.
"This 55 stranger, who owed me nothing and most 56 is more on the front lines
against the pandemic than I am, 57 his valuable masks, without even 58 me first," she added.
While the coronavirus pandemic has 59 the world as we know it, the kindness of people like Trooper Schwartz is a reminder that nothing can take away our 60 in times of crisis.
41. A. card B. sign C. ticket D. warning
42. A. bravery B. politeness C. wisdom D. kindness
43. A. living B. working C. travelling D. training
44. A. left out B. picked up C. pulled over D. taken away
45. A. driving B. speeding C. escaping D. wasting
46. A. office. B. fight C. embassy D. accident
47. A. friends B. family C. patients D. neighbors
48. A. delight B. advantage C. surprise D. satisfaction
49. A. serious B. boring C. broad D. frightening
50. A. knowledge B. network C. attack D. protection
51.A. cried B. left C. accepted D. apologized
52. A. seeing B. wishing C. treating D. knowing
53. A. joyful B. fearful C. optimistic D. cautious
54. A. continue B. benefit C. happen D. spread
55. A. disturbing B. distant C. honest D. complete
56. A. exactly B. strangely C. actually D. importantly
57. A. shared B. occupied C. traded D. handled
58. A. asking B. paying C. calling D. inviting
59. A. ruined B. changed C. guided D. opened
60. A. unity B. pride C. custom D. courage
第二节(共10小题；每小题1.5分，满分15分)
阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式，并将答案填写在答题卡上。
Li Chunru, 61 72-year-old retired doctor in a village in East China's Jiangxi Province, has been voluntarily taking care of wild birds at Poyang Lake Nature Reserve for over 30 years, bringing over 50, 000 62 (wound) birds out of danger.
For the past 36 years, Li Chunru woke up at 5 o'clock in the morning every day and walked along Poyang Lake regularly, protecting birds from any 63 (harm)human activity. Li is among a group of volunteers 64 came forward to protect the wild birds from illegal(不合法的)activities that are endangering the existence of some species in the area. His selfless 65 (devote) to the bird protection started one day 30 years ago, when a storm destroyed the birds' nest near his house, 66 (leave) the birds scattered around. Li was 67 (deep) struck by the scene and saved 310 out of the 370.
At first, Li's work was not understood by the 68 (villager) including his family. But Li never gave up. Instead, he kept convincing them with the knowledge of the law for environmental protection. His efforts finally paid off-more and more people started to accept Li's faith and voluntarily joined the team 69 birds' protection. And the aim of stopping illegal activities around Poyang Lake 70 (achieve) in 2017.
第四部分写作(共两节，满分35分)
第一节短文改错(共10小题；每小题1分，满分10分)
假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(\)划掉。
修改：在错的词下画一横线，并在该词下而写出修改后的词。
注意：
1.每处错误及其修改均仅限一词；
2.只允许修改10处，多者(从第11处起)不计分。
The other day on my way work, I helped a girl on a bus. She had put her lunch bag on the floor of the bus. When she picked them up to get off, the paper bag broke due to its heavy weigh. Her lunch all poured out onto a floor. She was very much embarrassed(尴尬的), and as her apple rolled to my feet, I immediate bent down and tried to help her. I offered her an extra plastic bag, where I had with me, and we joined hand in putting the rest of her lunch together.
She was such thankful that I could see her waving at me even after our bus leaves.
第二节书面表达(满分25分)
上周末，你参加了学校志愿者组织的一次户外环保活动,请你给某中学生英文报写一篇稿
件，介绍这次活动，内容包括：
1.活动目的；
2.活动内容(清除湖边垃圾,宜讲环保知识)；
3.你的感想。
注意：
1.词数100左右；
2.短文题目和首句已为你写好。
参考词汇：垃圾分类garbage-sorting
My Happy Weekend
Last weekend, the volunteers from our school did something very meaningful.
河南省天一大联考2019-2020学年高二下学期线上联考试题(理)
河南省天一大联考2019-2020学年 高二下学期线上联考试题（理） 考生注意： 1.答题前，考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。 2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。 3.考试结束后，将本试卷和答题卡一并交回。 一、选择题：本题共12小题，每小题5分，共60分。在每小题给出的四个选项中，只有一项是符合题目要求的。 1. 21i i -+＝ A.－2＋2i B.－1＋i C.－1－i D.2＋2i 2. =? A. 2 π B.π C.2π D.4π 3.利用数学归纳法证明f(n)＝1＋2＋3＋…＋(3n ＋1)(n ∈N * )时，第一步应证明 A.f(2)＝1＋2 B.f(1)＝1 C.f(1)＝1＋2＋3 D.f(1)＝1＋2＋3＋4 4.已知数列{a n }是等差数列，且a 6＝6，a 10＝8，则公差d ＝ A. 12 B.2 3 C.1 D.2 5.已知函数f(x)＝ax 2 ＋b 的图像开口向下，()() lim 4x f a x f a x ?→+?-=?，则a ＝ B. C.2 D.－2 6.《九章算术》是我国古代的数学名著，书中把三角形的田称为“圭田”，把直角梯形的田称为“邪田”，称底是“广”，高是“正从”，“步”是丈量土地的单位。现有一邪田，广分别为八步和十二步，正从为八步，其内部有块广为八步，正从为五步的圭田，若将100棵的果树均匀地种植
在邪田，一年后，每棵果树都有60kg 的果子收成，则此圭田中的收成约为 A.25kg B.50kg C.1500kg D.2000kg 7.根据右侧的程序框图，输出的S 的值为 A.1007 B.1009 C.0 D.－1 8.在复平面内，虚数z 对应的点为A ，其共轭复数z 对应的点为B ，若点A 与B 分别在y 2 ＝4x 与 y ＝－x 上，且都不与原点O 重合，则OA OB ?u u u r u u u r ＝ A.－16 B.0 C.16 D.32 9.在古希腊，毕达哥拉斯学派把1，3，6，10，15，21，28，36，45，这些数叫做三角形数。设第n 个三角形数为a n ，则下面结论错误的是 A.a n －a n －1＝n(n>1) B.a 20＝210 C.1024是三角形数 D. 123111121 n n a a a a n +++???+=+ 10.已知图中的三条曲线所对应的函数分别为y 1＝1x (x>0)，y 2＝x ，y 3＝1 4 x ，则阴影部分的面积为 A.1＋ln2 B.ln2 C.1 D.2 11.在△ABC 中，∠B ＝60°，AD 是∠BAC 的平分线，交BC 于D ，BD ，cos ∠BAC ＝ 1 4 ，则
2018-2019学年河南省天一大联考高二下学期阶段性测试(三)(4月)英语试题
河南省天一大联考2018-2019学年高二年级阶段性测试（三）英语最新试卷多少汗水曾洒下，多少期待曾播种，终是在高考交卷的一刹尘埃落地，多少记忆梦中惦记，多少青春付与流水，人生，总有一次这样的成败，才算长大。 第Ⅰ卷 第一部分阅读理解（共两节，满分40分） 第一节（共15小题；每小题2分，满分30分） 阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。 A Now it is time to go out to explore foreign lands and experience the different beaches that the world has to offer. Anse Sourced’ Argent, Seychelles--With beautiful pale pink sand, clear blue waters, and rock formations that have been shaped by waves and time, this beach’s beauty is enough to land itself on the cover of a travel magazine. And it is one of the most photographed baeches in the world. And don’t worry about any waves as the shores and shallow waters are protected by a nearby reef(礁). Maldives--Maldives is an island nation off the coast of Sri Lanka and one of the lowest nations of the world, Enjoy the soft sandy beaches, coconut-bearing palm trees, and a diverse sea life that surrounds you. But due to coral dying and rising sea levels, Maldives is expected to sink within the next 10 years. Freedom Beach, Thailand--Privacy(隐私) isn’t always so easy to find at a beach, but Freedom Beach in Thailand provides a much less crowded, more relaxing location to spend your time. With swimming, snorkeling(浮潜), and beach-side refreshments(点心,茶点), you are able to have the vacation that you deserve! Its neighboring beach, Patong, can get a little crowded and a bit crazy with the large number of tourists present, so escape via water taxi to enjoy yourself and a much cleaner shore. Matira Beach, Bara Bora--The island's economy is driven by tourism, so you know that all of the locals want you to have a great time and come back soon with all
河南省天一大联考2018-2019学年高二上学期阶段性测试(一)(11月)生物 Word版含解析
天一大联考_ 2018-2019学年高二年级阶段性测试(一） 生物 本试题卷分第I卷(选择题）和第Ⅱ卷(非选择题)两部分。考生作答时，将答案答在答题卡上(答题注意事项见答题卡），在本试题卷上答题无效。考试结束后，将本试题卷和答题卡一并交回。 第I卷 一、选择题:本大题共20小题，每小题2分，共40分。在每小题给出的四个选项中，只有一项是符合题目要求的。 1.人体细胞外液三种组成成分之间的关系如下图所示，下列相关说法正确的是 A.毛细血管壁细胞直接生活环境是① B.长期营养不良时①的渗透压升高 C. ①中含有较多的蛋白质，②③中的蛋白质含量较少 D.受伤后长出的水泡中的液体主要是② 2.下列有关人体的内环境与稳态说法中，错误的是 A.血浆中的缓冲物质会保持血浆的PH稳定不变化 B.大量出汗，Na+大量流失，可能会对细胞外液渗透压产生影响 C.神经一体液—免疫调节网络是机体维持稳态的主要调节机制 D.人体内环境稳态遭到破坏可能与外界环境的变化有关 3.下列与人体内环境有关的说法中，错误的是 A.内环境中Na+浓度下降，神经细胞的兴奋性会升高 B.内环境稳态是机体进行正常生命活动的必要条件 C.血浆渗透压下降可能会引起组织水肿
D.血浆渗透压的大小主要与无机盐和蛋白质的含量有关 4.如图是兴奋在神经纤维上产生和传导的示意图。下列相关说法错误的是 A.A处电位的形成主要与K+的跨膜运输有关 B.图中显示了兴奋在神经纤维上是双向传导的 C.兴奋传导的方向与膜内电流的方向一致 D. A处的膜电修金很快由“外负内正”转变为“外正内负” 5.下列与突触和神经递质有关的说法中，错误的是 A.有些激素(如肾上腺素）可以作为神经递质 B.突触只能在两个神经元之间形成 C.突触后膜上有与神经递质结合的特异性受体 D.兴奋通肆突触传递需要组织液的参与 6.下列与神经调节有关的说法中，错误的是 A.在反射弧上有电信号→化学信号→电信号的转换 B.脑中的高级中枢可以调控脊髓中相应的低级中枢 C.效应器产生的反应不一定属于反射活动 D.脑干中有维持身体平衡的中枢，体温调节中枢位于下丘脑 7.下列关于人体生命活动调节的说法中，正确的是 A.在炎热环境中，机体的散热量增加，产热量减少，散热量大于产热量 B.大脑皮层言语区的S区受损伤，病人不能看懂文字 C.长期服用性激素类似物可能导致性器官萎缩或功能异常 D.医院可通过尿液检测人体内胰岛素的含量 8.下列与人体血糖平衡调节有关的说法中，正确的是 A.骨骼肌细胞和神经细胞都是胰岛素作用的靶细胞
河南天一大联考高二阶段性测试(一) 英语含答案
天一大联考 2020－2021学年高二年级阶段性测试(一) 英语 考生注意： 1.答题前考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。 2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。 3.考试结束后，将本试卷和答题卡一并交回。 第一部分听力(共两节，满分30分) 做题时，先将答案标在试卷上，录音内容结束后，你将有两分钟的时间将试卷上的答案转涂到答题卡上。 第一节(共5小题；每小题1.5分，满分7.5分) 听下面5段对话，每段对话后有一个小题。从题中所给的A、B、C三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 例: How much is the shirt? A.￡19.15. B.￡9.18. C.￡9.15. 答案是C。 1. What does the woman want the boy to do? A. Read a story. B. Go to bed. C. Take a bath. 2. When will the speakers hold a party? A. On Friday night. B. On Saturday night. C. On Sunday night. 3. What did the woman do today? A. She kept at home. B. She stayed with some kids. C. She went to the bookstore. 4. What are the speakers talking about? A. A fire. B. An earthquake. C. A car accident. 5. What will the woman do tonight? A. Buy a calendar. B. Have a meeting. C. Attend a party.
2017-2018学年河南省天一大联考高二上学期阶段性测试二数学(理)试题
河南省天一大联考2017-2018学年高二年级阶段性测试二 理科数学 第Ⅰ卷（共60分） 一、选择题：本大题共12个小题,每小题5分,共60分.在每小题给出的四个选项中，只有一项是符合题目要求的. 1.抛物线28x y =的焦点坐标为（ ） A ．??? ??3210， B ．??? ??- 3210， C ．()02， D ．()02，- 2.下列叙述正确的是（ ） A ．若0≠x ，则21≥+ x x B ．方程()0,0122>>=+n m ny mx 表示的曲线是椭圆 C ．”“ac b =2是“数列c b a ,,为等比数列”的充要条件 D ．若命题01:0200<+-∈?x x R x p ，，则01:2≥+-∈??x x R x p ， 3.设R c b a ∈,,，则b a >的充要条件是（ ） A ．bc ac < B ．22b a > C ．55b a > D ． b a 11> 4.已知数列{}n a 是公比为21的等比数列，其前n 项和为n s ，则=4 4a s （ ） A ．15 B ．8 C. 815 D ．158 5.设变量y x ,满足约束条件?? ???≤-≥-≥+224x y x y x ，则目标函数x y z 2-=的最大值为（ ） A ．2 B ．1 C.0 D ．3 6.椭圆的长轴长、短轴长和焦距按照适当的顺序排列，可构成一个等差数列，则该椭圆的离心率（ ） A ．54 B ．53 C. 54或53 D ．52或5 3 7.三棱柱111C B A ABC -中，⊥1AA 平面ABC ， 60=∠BCA ，1CC CA BC ==，点N M ,分别是1111,C A B A 的中点，则BM 与AN 所成角的余弦值为（ ）
河南省天一大联考2020-2021学年高二阶段性测试(一)+数学(理)含答案
2020－2021学年高二年级阶段性测试(一) 数学(理科) 考生注意： 1.答题前考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。 2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。 3.考试结束后，将本试卷和答题卡一并交回。 一、选择题：本题共12小题，每小题5分，共60分。在每小题给出的四个选项中，只有一项是符合题目要求的。 1.在△ABC 中，BC ＝10，sinA ＝ 3 1 ，则△ABC 的外接圆半径为 A.30 3 C.20 D.15 2.已知数列{a n }满足a 1＝1，a n ＋1＝a n ＋6，则a 5＝ A.25 B.30 C.32 D.64 3.已知在△ABC 中，角A ，B ，C 的对边分别为a ，b ，c ，且a 2＝b 2＋c 2－10 13 bc ，则cosA ＝ A. 726 B.513 C.1726 D.1213 4.已知在△ABC 中，角A ，B ，C 的对边分别为a ，b ，c ，2a －20sinA ＝0，sinC ＝1 10 ，则c ＝ 2 B. 22 C.25 D.210 5.已知等差数列{a n }的前n 项和为S n ，且a 3＋a 8＝m ，S 10＝pm ，则p ＝ A.3 B.5 C.6 D.10 6.音乐与数学有着密切的联系，我国春秋时期有个著名的“三分损益法”：以“宫”为基本音“宫”经过一次“损”，频率变为原来的3 2 ，得到“徵”，“徵”经过一次“益”，频率变为原来的 3 4 ，得到“商”……依此规律损益交替变化，获得了“宫”“徵”“商”“羽”“角”五个音阶。据此可推得
河南省天一大联考2019-2020学年高二上学期阶段性测试试题(二)
一、选择题：本题共10小题，每小题5分，共50分。在每小题给出的四个选项中，第1～6题只有一个选项符合题目要求，第7～10题有多个选项符合要求。全部选对的得5分，选对但不全的得3分，有选错的得0分。 1.下列说法中正确的是 A.元电荷是自然界中带电量最小的带电体，电子、质子都是元电荷 B.电场线是为了形象地描绘电场而引入的假想曲线，其疏密程度反映了电场的强弱，电场线上各点的切线方向则为该点电场的方向 C.由F＝BIL可知，通电导线在磁场中一定会受到安培力的作用 D.法拉第发现了电磁感应现象，感应电流的方向遵循右手螺旋定则 2.如图所示，P、A、B、C是真空中一正四面体的四个顶点，D是BC边的中点，O是△ABC 的中心。现在P点固定一正点电荷，下列说法中正确的是 、B、C三点的电场强度相同 B.底面ABC为等势面 C.将一正试探电荷从B点沿直线BC移到C点，静电力对该试探电荷先做负功后做正功 、A、B、C、D点电势的高低φA＝φB＝φC>φD>φO 3.如图所示，空间存在一匀强磁场，现沿y轴方向放置一长为L的直导线，当导线中通以电流I时，受到沿z轴正方向、大小为F的安培力。则下列关于匀强磁场的判断中正确的是
A.一定沿x轴负方向，大小一定为F IL B.一定沿x轴正方向，大小一定为 F IL C.一定与z轴垂直，且不大于F IL D.一定与z轴垂直，且不小于 F IL 4.如图所示是研究电磁感应现象的实验装置，关于实验现象，下列说法中正确的是 A.当开关闭合或断开的瞬间，电流表的指针将发生偏转，且偏转方向相同 B.在开关断开的状态下，快速改变滑动变阻器滑片的位置，则电流表的指针将发生偏转 C.在开关闭合的状态下，迅速改变线圈A相对线圈B的位置，则电流表的指针将发生偏转 D.在开关闭合的状态下，一起晃动线圈A、B时(线圈A、B保持相对静止)，电流表的指针将会发生偏转 5.光伏发电技术的研究已有100多年的历史，硅光电池现已得到广泛地应用。某同学通过实验探究一硅光电池的U－I特性图线，所得实验结果如图所示，a、b是在不同光照强度下得到的两条图线，其中图线a对应的光照强度大。则由图可知
2019～2020学年河南省天一大联考高二上学期阶段性测试(二)数学(理)试题及答案解析
绝密★启用前 河南省·天一大联考 2019～2020学年高二年级上学期阶段性测试(二) 数学(理)试题 考生注意： 1.答题前，考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。 2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。 3.考试结束后，将本试卷和答题卡一并交回。 一、选择题：本题共12小题,每小题5分,共60分。在每小题给出的四个选项中,只有－项是符合题目要求的。 1.已知集合A＝{x|x2－5x＋6≥0},B＝{x|－1≤x<3},则A∩B＝ A.[－1,2] B.[－1,3] C.[2,3] D.[－1,＋∞) 2.如果b
2019-2020学年河南省天一大联考高二上学期阶段性测试(二)英语 (Word版)
绝密★启用前 天一大联考 2019－2020学年高二年级阶段性测试(二) 英语 考生注意： 1.答题前，考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。 2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。 3.考试结束后，将本试卷和答题卡一并交回。 第一部分听力(共两节，满分30分) 做题时，先将答案标在试卷上。录音内容结束后，你将有2分钟的时间将试卷上的答案转涂到答题卡上。 第一节(共5小题；每小题1.5分，满分7.5分) 听下面5段对话。每段对话后有一个小题，从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 例：How much is the shirt? A.￡19.15. B.￡9.18. C.￡9.15. 答案是C。 1. What are the speakers talking about? A. A sweater. B. A skirt. C. A bag. 2. Where are the speakers probably? A. In a supermarket. B. In a library. C. In a cafe. 3. What kind of animal does Simon like? A. Cats. B. Dogs. C. Rabbits. 4. What will the woman do for the man tomorrow? A. Treat him to lunch. R. Tutor him in his studies. C. Write him a thank-you note. 5. How much will the man pay finally?
河南省天一大联考2017-2018学年高二下学期阶段性测试(三)(4月)数学(理)试题(解析版)
天一大联考 2017—2018学年高二年级阶段性测试(三) 数学(理科) 第Ⅰ卷（共60分） 一、选择题：本大题共12个小题,每小题5分,共60分.在每小题给出的四个选项中，只有一项是符合题目要求的. 1. 若的实部与虚部相等，则实数（） A. -2 B. C. 2 D. 3 【答案】B 【解析】分析：首先将所给的复数利用四则运算法则进行计算，然后结合实部虚部的表达形式得到关于实数a的方程，解方程即可求得实数a的值. 详解：由题意可得：， 该复数的实部与虚部相等，则：， 求解关于实数a的方程可得：. 本题选择B选项. 点睛：复数中，求解参数(或范围)，在数量关系上表现为约束参数的方程(或不等式).由于复数无大小之分，所以问题中的参数必为实数，因此，确定参数范围的基本思想是复数问题实数化. 2. 对于小于41的自然数，积等于（） A. B. C. D. 【答案】A 【解析】分析：利用排列数、组合数公式逐项写出所给算式的表达形式，结合题意选择符合题意的选项即可. 详解：由排列数公式可知：， ，
； 本题选择A选项. 点睛：排列数、组合数公式是高中的基础公式，熟练掌握：(1)排列数公式；(2)组合数公式 ，这是正确计算的关键． 3. 若(为虚数单位)，则使的值可能是（） A. 0 B. C. D. 【答案】B 【解析】分析：首先计算的结果，结合所得的结果分别令实部、虚部相等，得到关于的三角方程，求解三角方程即可求得的值. 详解：由题意可得： ， 结合可得：，对比选项可知：. 本题选择B选项. 点睛：复数的基本概念和复数相等的充要条件是复数内容的基础，高考中常常与复数的运算相结合进行考查，一般属于简单题范畴. 4. 若函数有极大值点和极小值点，则导函数的大致图象可能为（） A. B. C. D. 【答案】C 【解析】分析：首先确定所给函数的导函数为是，然后结合函数的极值确定函数的单调性，由函数的单调
2019-2020学年河南省天一大联考高二上学期阶段性测试物理试题
天一大联考2019－2020学年高二年级阶段性物理测试一、选择题：本题共10小题，每小题5分，共50分。在每小题给出的四个选项中，第1～6题只有一个选项符合题目要求，第7～10题有多个选项符合要求。全部选对的得5分，选对但不全的得3分，有选错的得0分。 1.下列说法中正确的是 A.元电荷是自然界中带电量最小的带电体，电子、质子都是元电荷 B.电场线是为了形象地描绘电场而引入的假想曲线，其疏密程度反映了电场的强弱，电场线上各点的切线方向则为该点电场的方向 C.由F＝BIL可知，通电导线在磁场中一定会受到安培力的作用 D.法拉第发现了电磁感应现象，感应电流的方向遵循右手螺旋定则 2.如图所示，P、A、B、C是真空中一正四面体的四个顶点，D是BC边的中点，O是△ABC 的中心。现在P点固定一正点电荷，下列说法中正确的是 A.A、B、C三点的电场强度相同 B.底面ABC为等势面 C.将一正试探电荷从B点沿直线BC移到C点，静电力对该试探电荷先做负功后做正功 D.O、A、B、C、D点电势的高低φA＝φB＝φC>φD>φO 3.如图所示，空间存在一匀强磁场，现沿y轴方向放置一长为L的直导线，当导线中通以电流I时，受到沿z轴正方向、大小为F的安培力。则下列关于匀强磁场的判断中正确的是 A.一定沿x轴负方向，大小一定为F IL B.一定沿x轴正方向，大小一定为 F IL
C.一定与z轴垂直，且不大于F IL D.一定与z轴垂直，且不小于 F IL 4.如图所示是研究电磁感应现象的实验装置，关于实验现象，下列说法中正确的是 A.当开关闭合或断开的瞬间，电流表的指针将发生偏转，且偏转方向相同 B.在开关断开的状态下，快速改变滑动变阻器滑片的位置，则电流表的指针将发生偏转 C.在开关闭合的状态下，迅速改变线圈A相对线圈B的位置，则电流表的指针将发生偏转 D.在开关闭合的状态下，一起晃动线圈A、B时(线圈A、B保持相对静止)，电流表的指针将会发生偏转 5.光伏发电技术的研究已有100多年的历史，硅光电池现已得到广泛地应用。某同学通过实验探究一硅光电池的U－I特性图线，所得实验结果如图所示，a、b是在不同光照强度下得到的两条图线，其中图线a对应的光照强度大。则由图可知 A.该硅光电池的电动势受光照强度影响很大 B.该硅光电池的内阻仅受光照强度的影响 C.在外电路为定值电阻的情况下，光照强度大，则电池的输出功率大 D.在外电路为定值电阻的情况下，光照强度大，则电池的效率低 6.如图所示，空间存在一单边有界的匀强磁场，磁场方向垂直纸面向里。在磁场边界S点处有一电子源，可以沿纸面向磁场内发射速率相同的电子，已知电子的入射方向与磁场边界的最小夹角为45°，不计电子的重力和电子间的相互作用。下列图中用阴影部分表示电子可能经过的区域，其中正确的是
河南省天一大联考2019-2020学年高二上学期阶段性测试(二)数学(文)试题(带答案)
试卷第1页，总4页 河南省天一大联考2019-2020学年高二上学期 阶段性测试二--文科数学试题 第I 卷（选择题) 一、单选题 1．已知集合{}2560A x x x =-+≥，{}13B x x =-≤<，则A B =I （ ） A ．[]1,2- B ．[]1,3- C ．[]2,3 D ．[)1,-+∞ 2．如果0b a <<，那么下列不等式错误的是（ ） A ．33a b > B ．b a > C ．ln 2ln 2a b < D ．11b a < 3．命题“[)2,x ?∈+∞，()2log 10x ->”的否定为（ ） A ．[)2,x ?∈+∞，()2log 10x -< B ．[)02,x ?∈+∞，()20log 10x -≤ C ．(),2x ?∈-∞，()2log 10x -< D ．()0,2x ?∈-∞，()20log 10x -≤ 4．“函数()(21)x f x a =-是增函数”是“2a >”的（ ） A ．充分不必要条件 B ．必要不充分条件 C ．充要条件 D ．既不充分也不必要条件 5．已知{}n a 是等差数列，且2a ，4038a 是函数()2162020f x x x =--的两个零点，则 2020a =（ ） A ．8 B ．8- C ．2020 D ．2020- 6．已知双曲线C ，则该双曲线的实轴长为（ ） A ．1 B C ．2 D ．7．在ABC V 中，a ，b ，c 分别是角A ，B ，C 的对边，若()()0a b c a b c ab ---++=且1sin 2 A =，则 B =（ ） A ．2π B ．3π C ．4π D ．6 π
2020-2021学年河南省天一大联考高二阶段性测试(一) 生物 Word版
2020-2021学年河南省天一大联考高二阶段性测试（一）生物 考生注意： 1.答题前考生务必将自己的姓名、考生号填写在试卷和答题卡上，并将考生号条形码粘贴在答题卡上的指定位置。 2.回答选择题时，选出每小题答案后，用铅笔把答题卡对应题目的答案标号涂黑。如需改动，用橡皮擦干净后，再选涂其他答案标号。回答非选择题时，将答案写在答题卡上。写在本试卷上无效。 3.考试结束后，将本试卷和答题卡一并交回。 一、选择题：本题共25小题，每小题2分，共50分。在每小题给出的四个选项中，只有一项是符合题目要求的。 1.下列属于内环境成分的是 A.RNA聚合酶 B.血红蛋白 C.血清球蛋白 D.唾液淀粉酶 2.神经细胞生活的内环境是 A.血浆 B.组织液 C.淋巴 D.细胞内液 3.血浆中有大量的水，下列不是血浆中水的直接来源的是 A.血细胞 B.组织液 C.淋巴 D.消化液 4.服用葡萄糖酸锌口服液可以补锌。葡萄糖酸锌最先到达的人体内环境成分是 A.胃液 B.组织液 C.血浆 D.细胞内液 5.如图为甲、乙、丙、丁四种体液及它们之间相互关系的示意图，下列相关叙述正确的是 A.甲为细胞内液，丁为血浆 B.甲、乙、丙、丁之间都能够直接相互转化 C.正常情况下，乙、丙、丁的成分和理化性质保持不变 D.外界环境中的氧气通过内环境被细胞利用 6.下列选项描述的变化属于人体内环境理化性质改变的是 A.喝了果醋后胃液pH下降 B.感冒发烧，细胞外液温度上升 C.进食过咸的食物导致口腔上皮细胞皱缩 D.一次性喝水过多，导致尿液增加，尿液渗透压下降
7.如图为正常人体细胞与内环境之间物质交换的示意图，①②③④表示人体内的体液成分。据图判断，下列叙述正确的是 A.剧烈运动产生的乳酸会导致①的pH显著下降 B.②中含有葡萄糖、尿素、纤维素等物质 C.与③相比，①中含有较多的蛋白质 D.淋巴细胞直接生活的环境只有② 8.已知5%葡萄糖溶液的渗透压与动物血浆渗透压基本相同，5%葡萄糖溶液常作为静脉注射的溶液。下列叙述正确的是 A.注射5%葡萄糖溶液后血浆渗透压会迅速升高 B.注射5%葡萄糖溶液后血浆中Na＋浓度会下降 C.注射5%葡萄糖溶液可同时补充盐分和糖分 D.注射的葡萄糖不能供组织细胞利用 9.下列有关人体内环境组成的叙述，正确的是 A.细胞外液只包括血浆、组织液和淋巴 B.糖原水解为葡萄糖的过程发生在内环境中 C.毛细血管处血浆和组织液之间相互转化的量总是平衡的 D.组织液的渗透压升高可能会导致机体细胞发生失水现象 10.皮肤被烫伤后会起“水泡”，“水泡”中的液体主要是 A.组织液 B.血浆 C.淋巴 D.细胞液 11.山西的小王经常吃醋，但他血浆的pH并没有比其他人低，在维持血浆酸碱平衡的过程中，发挥重要作用的离子是 A.Na＋、Cl－ B.HCO3－、HPO42－ C.HSO4－、Cl－ D.Mg2＋、Ca2＋ 12.下表为小明的一天抽查体温的情况表，结合所学知识，不能得出的结论是 A.人体体温的稳定是相对的 B.不同个体的体温是不同的 C.同一个体在不同时间的体温不同 D.小明的体温在正常的范围内变化
2018-2019学年河南省天一大联考高二(下)期末数学试卷(理科)
2018-2019学年河南省天一大联考高二（下）期末数学试卷（理 科） 一、选择题：本题共12小题，每小题5分，共60分在每小题给出的四个选项中，只有一项是符合题目要求的 1．（5分）＝（） A．B．C．D． 2．（5分）已知集合A＝{1+x2，x}，B＝{1，2，3}，且A?B，则实数x的值是（）A．﹣1B．1C．3D．4 3．（5分）给定下列两种说法：①已知a，b，c∈R，命题“若a+b+c＝3，则a2+b2+c2≥3” 的否命题是“若a+b+c≠3，则a2+b2+c2＜3”；②“?x0∈R，使f（x0）＞0”的否定是“?x∈R，使f（x）≤0”，则（） A．①正确②错误B．①错误②正确C．①和②都错误D．①和②都正确4．（5分）已知sin2α＝cos2α（α≠kπ+，k∈Z），则tan2α＝（） A．B．1C．D． 5．（5分）过抛物线y2＝2px的焦点F的直线l交抛物线于A，B两点，其中点A（2，y0），且|AF|＝4，则p＝（） A．1B．2C．4D．8 6．（5分）某几何体的三视图如图所示，则该几何体的体积为（） A．64+B．64+C．64+D．64+8π 7．（5分）某军工企业为某种型号的新式步枪生产了一批枪管，其口径误差（单位：微米）
服从正态分布N（1，32），从已经生产出的枪管中随机取出一只，则其口径误差在区间（4，7）内的概率为 （附：若随机变量ξ服从正态分布（μ，σ2），则P（μ﹣σ＜ξ＜μ+σ）＝68.27%，P（μ﹣2σ＜ξ＜μ+2σ）＝95.45%）（） A．31.74%B．27.18%C．13.59%D．4.56% 8．（5分）已知a，b为两条不同的直线，α，β为两个不同的平面，则 ①若a⊥α，b⊥β，且α∥β，则a∥b；②若a⊥α，b∥β，且α∥β，则a⊥b； ③若a∥α，b⊥β，且α⊥β，则a∥b；④若a⊥α，b⊥β，且α⊥β，则a⊥b； 其中真命题的个数是（） A．4B．3C．2D．1 9．（5分）函数f（x）＝（）|x+1|的图象大致为（） A．B． C．D． 10．（5分）已知双曲线﹣＝1（a＞0，b＞0）的一条渐近线方程为y＝x，P为该 双曲线上一点，F1，F2为其左、右焦点，且PF1⊥PF2，|PF1|?|PF2|＝18，则双曲线的方程为（） A．﹣＝1B．﹣＝1 C．﹣＝1D．﹣＝1
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