2015一模易错题(一)
1.I’d like to thank you for the great ________ of being ad dressing this assembly,
sharing my opinion of living a low-carbon life.
A. privilege
B. principl e
C. possibility
D. presentation
2.David has done good d eeds all his life, ________ him a l ot of popularity.
A. earned
B. earning
C. to earn
D. having earned
3.Don’t put me on the spot like this. You know, because of my duty, I can’t give
away _______ information to you.
A. contemporary
B. conventional
C. confid ential
D. consistent
4.Research on brain activity shows imagination is generated in the right sid e of
the brain; ________, the l eft sid e of the brain is thought to be “l ogical”.
A. in contrast
B. in consequence
C. in a word
D. in other words
5.Shy as he is, Rebecca’s intelligence ________ her character, which ensures her
main position in the d ebating team.
A. caters to
B. accounts for
C. compensates for
D. submits to
6.–What has mad e him so knowl edgeabl e?
--________ d omestic and foreign classics.
A. Having exposed to
B. Being exposed to
C. Exposing to
D. Exposed to
7.Is is reported that China ________ its first orbiting space station by around
2022.
A. is to complete
B. is going to complete
C. will complete
D. will have completed
https://www.wendangku.net/doc/233004390.html,st week, I tried to contact all former classmates, but one or two ________
through the net.
A. slid
B. slipped
C. skipped
D. squeezed
9.Nowadays, more and more young ladies, ________ figures most are fine enough,
are going on a diet.
A. who
B. whose
C. of whose
D. of whom
10.By the time children ________ up to three years, they will have spoken a little
Chinese.
A. will grow
B. grow
C. will be grown
D. are grown
11.Three boys have been ________ from our school for constant bad behavior
since the new rul e took effect.
A. removed
B. cancell ed
C. suffered
D. offend ed
12.I can’t take all the ________ for the show’s success; it was a team effort.
A. possession
B. cooperation
C. credit
D. blame
13.When we watch a magic show, we often stare at the magic man ________, as
though he were a vision.
A. in conclusion
B. in vain
C. in consequence
D. in wond er
14.–Hi, Jim. Did you place an ord er for ten books with that company?
-- Yeah. We ________ a l ot before the d eal.
A. have talked
B. are talking
C. woul d talk
D. had talked
15.–Has Jim mad e up with Mary yet?
--Yeah. They ________ every two weeks, but their quarrels never last.
A. drop put
B. fall out
C. speak out
D. break out
16.If my d octor inquired about my physical condition at the present moment,
the only possibl e reply woul d be that I ________ greatly in need of relaxation.
A. woul d be
B. woul d have been
C. was
D. am
17.Bookshops can often host readings and other cultural events _________ you
d on’t feel lik
e reading in them.
A. now that
B. so that
C. even if
D. as if
18.– I hear Tom has fail ed in the spoken English test.
-- You said it. The written record of his conversation didn’t ________ to what was actually said.
A. contribute
B. correspond
C. distribute
D. respond
19.Little ________ about English literature, so he has intention to take it as his
major.
A. d oes he know
B. he knows
C. did he know
D. he knew
20.–Was it ________ Stanl ey fail ed the driving test again ________ mad e him d epressed
this morning?
-- Yes, I can’t agree more with you.
A. that; which
B. which; that
C. which; which
D. that; that
21.Word power shoul d be taken seriously because of the benefits ________ can
have on the stud ents’ vocabu lary building.
A. this
B. that
C. it
D. one
22.– Is there any hope of saving his life?
-- His injuries are extremely serious but he is expected to ________.
A. pull in
B. pull out
C. pull up
D. pull through
23.It is said that many peopl e were pickpocketed whil e they were appreciating
the Mona Lisa Smil e, for many visitors would habitually check where their valuabl es are, _________ their l ocation to thieves.
A. giving away
B. giving up
C. giving in
D. giving off
24.________, they dived into a taxi and head ed for the airport.
A. Goodbye was said
B. Goodbye said
C. Goodbye having said
D. Goodbye saying
25.– How d o you find the Blackberry company?
-- I’m a little worried. It ________ ground as a l eader in the fiel d of mobile phones with Appl e speeding up its d evelopment.
A. is losing
B. was losing
C. woul d l ose
D. had l ost
26.“Chinese dama”, a group ________ mainly of married women between 40 and
60, ________ the attention of the public for the first time in 2013.
A. consisted; grabbing
B. consisting; grabbing
C. consisting; grabbed
D. consisted; grabbed
27.My interest in surfing the Internet has ________ most of my spare time, but it
has repaid me a great of enjoyment.
A. taken off
B. taken d own
C. taken up
D. taken away
28.In 2014, such important reform policies associated with interests of the
general public were introduced in China _________ almost each person coul d benefit from in life.
A. when
B. that
C. where
D. as
29.– Sharon, many experts believe that the two pictures are roughly ________.
-- I d on’t quite agree. The painting styl es may l ook very similar but their painters were born in quite different dynasties.
A. conventional
B. contradictory
C. contemporary
D. conservative
30.– How l ong d o you expect it ________ before the African can keep the disease
und er control?
-- As soon as possibl e.
A. is
B. has been
C. will be
D. will have been
31.The three travellers finally reached the home of Bertha’s mother around
dusk, ________ 65 mil es in less than 12hours.
A. covering
B. having covered
C. to cover
D. to have covered
32.– I woul d be greatly thankful to Jason Coates who rescued my life after I fell
through the ice.
-- That’s it. You _________ Christina, your wife but that Jason pull ed you from the canal.
A. will never meet
B. woul d never meet
C. woul d never have met
D. will never have met
33.Many climate experts warn that, like a sl eep-walker, we seem unabl e to
________ the potential disasters that the gl obal warming might bring about.
A. stand up to
B. wake up to
C. live up to
D. l ook up to
34.You can’t expect John and Jane will have different opinions. When one of
them makes any proposal, the other will readily ________.
A. compromise
B. consent
C. conflict
D. consult
35.Many l ocal citizens wrote to the mayor, complaining that the police were
always failing to take adequate measures to ________ the growth in crime.
A. d ecline
B. quit
C. reject
D. check
36.While visiting Europe, I was lucky to have the great ________ of praying in a
historic church that dates back to the early 12th century.
A. favor
B. motivation
C. equally
D. privilege
(二)
1. ___________ a distinctive scenic spot worth __________, Yangzhou , a friendly city, appeals to visitors from all over the worl d.
A. Consid ered; visited
B. Consid ered; visiting
C. Consid ering; visiting
D. Consid ering; being visited
2. As the principl e puts it, “ No one __________ the campus without the permission of the head teacher.
A. is leaving
B. is to l eave
C. will l eave
D. l eaves
3. Jack Ma, found er and executive chairman of China’s Alibaba Group, has a $28.6 billion fortune, __________ making him the richest person in China.
A. it
B. one
C. that
D. which
4. We first met in the Slend er West Lake in 2010, and both of us felt immediately that we __________ each other for years.
A. knew
B. know
C. have known
D. had known
5. Joint d evelopment plan of Nanjing –Zhengjiang-Yangzhou __________, resid ents in the area will enjoy a happier life.
A. was released
B. being rel eased
C. released
D. having released
6. I hope that the little ___________ I have been abl e to d o has been of some use.
A. what
B. which
C. that
D. as
7. In case anyone present at the meeting tonight __________ need any help, here’s my number for you to contact me.
A. can
B. shall
C. shoul d
D. must
8. ---I heard that some police didn’t all ow suspects enough sl eep to get so-call ed criminal evid ence in America.
---__________? This certainly goes against the rul e of law.
A. Who cares
B. Why bother
C. What for
D. How so
9. At the celebration gathering, Presid ent Xi expressed his belief that Macao will progress in __________ more steady manner on the right track, guid ed by ________ “one country, two system” policy.
A. a; a
B. a; the
C. the; the
D. the; a
10. ---Next to the hostess __________, Who is he?
---Tony, our monitor. He’ll give a speech titl ed “Discover Yourself”.
A. a boy stands
B. is standing a boy
C. stands a boy
D. d oes a boy stand
11. Neither sid e seems to have a _________ solution; there are still many uncertainties on this issue.
A. familiar
B. theoretical
C. d efinite
D. confid ential
12. --- I __________ to get a chance to discuss our homework with you.
---Ok. Let’s meet at seven o’cl ock toni ght.
A. wanted
B. have wanted
C. have been wanting
D. had wanted
13. An ancient templ e __________ back to the Northern Qi Dynasty was destroyed in flames last month, __________ concerns about the effective protection of cultural remains.
A. dating; causing
B. dating; caused
C. dated; causing
D. dated; caused
14. ---It’s said that the plan for the project didn’t pass, with the majority of the board members __________ to it.
---Oh, what a pity!
A. reduced to
B. submitted to
C. committed to
D. opposed to
15. Even though it d oesn’t feel like a fairy tale, I still feel like I am living in a cartoon with him every day __________ we can lie d own and live a carefree life.
A. where
B. which
C. when
D. whom
16. --- What impressed you most when you visit the Acropolis?
--- __________ it is that has brought the former grand palace into today’ terribl e scene.
A. What
B. Where
C. How
D. When
17. Peopl e in the office regard him as “__________”. He is not only knowl edgeabl e but also honest and nice to everyone.
A. a wet blanket
B. a black sheep
C. the appl e of the eyes
D. the salt of the earth
18. Welcome to take this time number G7589 High-speed Rail Train __________ for North Changzhou from Xuzhou, the train will arrive in Changzhou North station terminal, pl ease take passenger baggage, thanks!
A. bid
B. intend ed
C. bound
D. l eft
19. ---Oh, I’m sick of the weather here.
---So am I. It __________ since last Friday. Wish it coul d stop raining tomorrow.
A. rained
B. has rained
C. was raining
D. has been raing
20. Welcome! We __________ non-Chinese customers with bilingual menus written both in Chinese and English.
A. cater to
B. serve for
C. target at
D. check in
21. It ___________ me the other day that I might not have paused to think of life meaning for years.
A. appeal ed to
B. referred to
C. occurred to
D. happened to
22. When it comes to the majority of the latest technol ogies in the next 20 years, __________ has greater potential than the technology being d eveloped in these young peopl e’s company, __________ in my eyes will l ead to a revolution.
A. nothing; which
B. none; where
C. nothing; where
D. none; which
23. ___________ girls can be ____________ they would like to be, whether it is a pilot or an astronaut, is being accepted all around the worl d.
A. what; whomever
B. That; whatever
C. If; whoever
D. /; whatever
24. The fathers expressed a common d esire at the parents’ meeting by the school, __________ d esire that more sleep and freed om __________ be provid ed to their children.
A. the; must
B. the; shoul d
C. a; must
D. a; /
25. ---Mum, d o you have a __________?
---Sorry d ear, I woul d ___________ listen to your story now. But you see this endl ess work?
A. second; however
B. second; otherwise
C. time; otherwise
D. time; however
26. ---Mr. Smith, you are fined for over-speeding. Please sign here.
---Fined? Over-speeding? ___________.
A. Are you all right?
B. You can’t be serious!
C. Mind your own business!
D. You asked for it!
27. In ord er to encourage participation in class activities, teachers may call on stud ents __________ whether they have raised hands.
A. regardl ess of
B. instead of
C. in terms of
D. on top of
28. ---I’ve sold my first painting.
---This is really __________! Someone actually thinks your painting fantastic.
A. everything
B. anything
C. nothing
D. something
29. We have been trying to train the young peopl e who were hired last month, but
they ___________ their best to l earn.
A. were not d oing
B. didn’t d o
C. are not d oing
D. hadn’t d one
30. Expanding populations and steadily improving communications brought more trad e and contract, but also more __________ between social groups.
A. cooperation
B. friction
C. liberation
D. distribution
31. To prevent further pollution, many peopl e are __________ the use of alternative energy sources.
A. applying to
B. compensating for
C. catering to
D. pushing for
32. If you put a stone on the way of an ant, it will go around, over, und er or on top, without stopping, until it finds a way to get __________ it needs to be.
A. what
B. how
C. which
D. where
33. Having seen several d eadly traffic accid ents recently, China’s traffic police launched __________ breath tests among all drivers.
A. authentic
B. rand om
C. vague
D. tentative
34. Selfies(自拍) have become popular because __________ than stopping a stranger to take a photo, but you can take as many pictures as you like.
A. not only is taking out a smart phone less awkward
B. not only taking out a smart phone is l ess awkward
C. not only is taking out a smart phone more awkward
D. not only taking out a smart phone is more awward
35. The plans got __________ in the approval process, so everyone had to stop and wait until the application forms come back from the ministry.
A. struck
B. occupied
C. stuck
D. d elivered
36. For those pioneers, the ocean was not a barrier but a known landscape __________ they travell ed constantly by boat to exchange goods and knowledge.
A. with whom
B. across which
C. through which
D. from where
37. ---It is said that Tom once ran away from home.
---Yes. After spending every penny of his money and __________ himself out, he went back home.
A. being reduced to hire
B. was reduced to hire
C. was reduced to hiring
D. being reduced to hiring
38. ---The boss of Mocrosoft, Satya Nad ella, had to apol ogize for remarks he mad e advising women not to ask for a pay rise but to have “faith in the system.”
A. Accid ents will happen
B. A good d og d eserves a good bone
C. A cl ose mouth catches no flies
D. Actions speak l oud er than words.
一模错题
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一模错题
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一模错题
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一模错题
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一、中考数学压轴题 1.已知:矩形ABCD 内接于⊙O ,连接 BD ,点E 在⊙O 上,连接 BE 交 AD 于点F ,∠BDC+45°=∠BFD ,连接ED . (1)如图 1,求证:∠EBD=∠EDB ; (2)如图2,点G 是 AB 上一点,过点G 作 AB 的垂线分别交BE 和 BD 于点H 和点K ,若HK=BG+AF ,求证:AB=KG ; (3)如图 3,在(2)的条件下,⊙O 上有一点N ,连接 CN 分别交BD 和 AD 于10点 M 和点 P ,连接 OP ,∠APO=∠CPO ,若 MD=8,MC= 3,求线段 GB 的长. 2.如图,已知抛物线y =2ax bx c ++与x 轴交于A 3,0-(),B 33,0()两点,与y 轴交于点C 0,3(). (1)求抛物线的解析式及顶点M 坐标; (2)在抛物线的对称轴上找到点P ,使得PAC 的周长最小,并求出点P 的坐标; (3)在(2)的条件下,若点D 是线段OC 上的一个动点(不与点O 、C 重合).过点 D 作D E //PC 交x 轴于点E .设CD 的长为m ,问当m 取何值时, PDE ABMC 1 S S 9 =四边形. 3.如图1,抛物线2 (0)y ax bx c a =++≠的顶点为C (1,4),交x 轴于A 、B 两点,交y 轴于点D ,其中点B 的坐标为(3,0). (1)求抛物线的解析式;
(2)如图2,点E是BD上方抛物线上的一点,连接AE交DB于点F,若AF=2EF,求出点E的坐标. (3)如图3,点M的坐标为(3 2 ,0),点P是对称轴左侧抛物线上的一点,连接MP, 将MP沿MD折叠,若点P恰好落在抛物线的对称轴CE上,请求出点P的横坐标. 4.如图,在梯形ABCD中,AD//BC,AB=CD=AD=5,cos 4 5 B ,点O是边BC上的动点, 以OB为半径的O与射线BA和边BC分别交于点E和点M,联结AM,作 ∠CMN=∠BAM,射线MN与边AD、射线CD分别交于点F、N. (1)当点E为边AB的中点时,求DF的长; (2)分别联结AN、MD,当AN//MD时,求MN的长; (3)将O绕着点M旋转180°得到'O,如果以点N为圆心的N与'O都内切,求
2015年最新中考科学:电学部分(难题、易错题)汇编 (考试内容:电流与电路、电压与电阻、欧姆定律、电功率、电与磁、生活用电) 一、选择题(每题2分,共50分) 1.如图所示,通草球甲、乙相互排斥,甲、丙相互吸引,如果已知甲带正电,那么乙、丙的带电情况是() A.乙带负电,丙带正电 B.乙带正电、丙带正电 C.乙带负电,丙带负电或不带电 D.乙带正电、丙带负电或不带电 2.由欧姆定律I=U/R变形可得R=U/I;下列说法正确的是() A.导体电阻跟它两端的电压成正比B.导体电阻跟通过它的电流成反比C.导体电阻跟通过的电流和它两端电压无关D.导体电压跟通过它的电流成正比 3.如图所示电路,下列分析正确的是() A.只闭合S1时,L2发光、L1不发光,A2测L2电流 B.只闭合S2时,L1发光、L2不发光,A1测L1电流 C.闭合S1、S2时,L1、L2并联,A2测L2电流 D.闭合S1、S2时,L1、L2串联,A1、A2示数相等 4.在探究串联电路电压关系实验中,科学实验小组按如图所示的电路测得V的示数是3.8V,V1的示数是2.3V,V2的示数应为() A.1.5V B.3.8V C.2.3V D.6.1V 第4题图第5题图第6题图 5.如图所示,当开关S闭合后,下列说法正确的是() A.灯L1与灯L2是串联,且灯L1被短路B.电压表可测出灯L1两端的电压 C.电流表A1测的是灯L1的电流D.电流表A2测的是灯L1的电流 6.灯泡L上标有“2.5V”的字样,它的电阻随它两端电压的变化关系如图所示,下列说法中正确的是() A.灯泡L的额定电流是0.2A B.灯泡L正常发光时的电阻是10ΩC.灯泡L的额定功率是6.25W D.灯丝的电阻随电压的增大而减小7.关于“12V 4W”的小灯泡L1和“9V 3W”的小灯泡L2,下列说法正确的是()A.L l和L2正常工作时的电阻一样大 B.L l和L2串联在一起使用时,两灯消耗的功率一样多 C.L l和L2并联在一起使用时,两灯消耗的功率一样多 D.L2串联一个9Ω的电阻接在12V电路中,也能正常发光 8.如图所示,甲、乙、丙三个密闭容器中密封着等量的空气,U型管中液面高度的变化反映密闭空气温度的变化。三个容器中的电阻丝串联起来接到电源两端,其中在丙容器的外部,将一个电阻和这个容器内的电阻并联。通电一段时间后,U型管中两侧的液面高
(人教B版)高中数学必修一(全册)同步练习汇总 1.下列所给对象不能构成集合的是(). A.平面内的所宥点 B.直角坐标系中第一、三象限的角平分线上的所宥点 C.清华大学附中高三年级全体学生 D.所宥高大的树 2.下列语句中正确的个数是(). ①0∈N+;②π∈Q;③由3,4,4,5,5,6构成的集合含宥6个元素;④数轴上1到1.01间的线段包括端点的点集是宥限集;⑤某时刻地球上所宥人的集合是无限集.A.0B.1C.2D.3 3.(易错题)由a2,2-a,4组成一个集合A, A中含宥3个元素, 则实数a的取值可以是(). A.1 B.-2 C.6 D.2 -.其中正确的个数是4.给出以下关系式: 2∈R, ②2.5∈Q, ③0∈?, ④3N ().
A .1 B .2 C .3 D .4 5.以实数x , - x , 2x , |x |, -|x |, 2x -, 33x -, 3 3x 爲元素所构成的集合中最多 含宥( ). A .2个元素 B .7个元素 C .4个元素 D .5个元素 6.已知x , y , z 是非零实数, 代数式xyz x y z x y z xyz +++ 的值所组成的集合爲M , 则M 中宥________个元素. 7.对于集合A ={2,4,6}, 若a ∈A , 则6-a ∈A , 那么a 的值是________. 8.用符号∈和?填空. (1)设集合A 是正整数的集合, 则0________A , 2________A , (-1)0________A ; (2)设集合B 是小于11的所宥实数的集合, 则23________B,1+2________B ; (3)设集合C 是满足方程x =n 2+1(其中n 爲正整数)的实数x 的集合, 则3________C,5________C ; (4)设集合D 是满足方程y =x 2的宥序实数对(x , y )的集合, 则-1________D , (-1,1)________D . 9.关于x 的方程ax 2+bx +c =0(a ≠0且a , b , c ∈R ), 当a , b , c 满足什么条件时, 以实数解构成的集合分别爲空集、含一个元素、含两个元素? 10.数集M 满足条件: 若a ∈M , 则11a M a +∈-(a ≠± 1, 且a ≠0), 已知3∈M , 试把由此确定的M 的元素求出来.
来看这些历年中考数学易错题你能都做对吗?(附答案) 作者:学大教育编辑整理 来源:网络 一、选择题 1、A 、B 是数轴上原点两旁的点,则它们表示的两个有理数是( ) A 、互为相反数 B 、绝对值相等 C 、是符号不同的数 D 、都是负数 2、有理数a 、b 在数轴上的位置如图所示,则化简|a-b|-|a+b|的结果是( ) A 、2a B 、2b C 、2a-2b D 、2a+b 3、轮船顺流航行时m 千米/小时,逆流航行时(m-6)千米/小时,则水流速度( ) A 、2千米/小时 B 、3千米/小时 C 、6千米/小时 D 、不能确定 4、方程2x+3y=20的正整数解有( ) A 、1个 B 、3个 C 、4个 D 、无数个 5、下列说法错误的是( ) A 、两点确定一条直线 B 、线段是直线的一部分 C 、一条直线是一个平角 D 、把线段向两边延长即是直线 6、函数y=(m 2-1)x 2-(3m-1)x+2的图象与x 轴的交点情况是 ( ) A 、当m ≠3时,有一个交点 B 、1±≠m 时,有两个交 C 、当1±=m 时,有一个交点 D 、不论m 为何值,均无交点 7、如果两圆的半径分别为R 和r (R>r ),圆心距为d ,且(d-r)2=R 2,则两圆的位置关系是( ) A 、内切 B 、外切 C 、内切或外切 D 、不能确定 8、在数轴上表示有理数a 、b 、c 的小点分别是A 、B 、C 且b 潍坊五中2011中考复习之易错题精选 1.2011年央视《每周质量报告》的3·15特别节目曝光:河南生猪主产区采用违禁药品瘦肉精,有毒猪肉流向双汇分公司。“瘦肉精“的化学式C12H19Cl3N2O,则下列有关瘦肉精的说法中不正确的是 A、瘦肉精分子中含有氮分子 B.瘦肉精由碳、氢、氧、氯、氮五种元素组成 C.每个瘦肉精分子由37个原子构成 D.瘦肉精中质量分数最大的是碳元素 2.分类是学习和研究化学物质及其变化的一种常用的基本方法。现有药品硫酸铝,它与下列哪组属于同一类物质 A.盐酸、硫酸B、氯化钠、碳酸钾 C.二氧化碳、四氧化三铁 D.氢氧化铝、氢氧化钠 3.从图所示的两种微粒结构示意图中,所获取信息不正确的是 A、它们属于同种元素B.它们的核外电子层数相同 C.它们的核外电子数相同D.①表示阴离子,②表示原子 4.下列各项不随水量的变化而变化的是 A.溶液中溶质的质量分数B、物质的溶解度 C.电解水生成的氢气和氧气D.酸溶液的pH 5.现有t℃时的硫酸铜饱和溶液,下列有关叙述违背客观事实的是 A.加入一定量的硝酸铵固体后,固体溶解,并使溶液温度下降 B、加入一定量的水后,溶质质量变小 C.加入一定量的水后,硫酸铜溶解度不变,溶液变成不饱和溶液 D.放入一根铁丝后,铁丝表面有亮红色物质析出,说明铁比铜活泼 6.某同学对下列四个实验都设计了两种方案,其中方案1合理、方案2不合理的是 选项 A. B、 C. D. 实验目的除去氢氧化钠中 少量的碳酸钠 清洗铁制品 表面的铁锈 鉴别氯化钠 溶液和稀盐酸 检验一氧化碳中是否 混有二氧化碳气体 方案1 加水溶解加适量稀盐酸加锌粒点燃 方案2 加稀硫酸用水洗涤加石蕊溶液通入澄清石灰水7.下列实验对应的图像正确的是 A.将等质量的镁和铝分别与足量的盐B.向pH=2的盐酸 中滴加过量的氢 C、向盐酸和氯化铁的 混合溶液中加入过量 D.向pH=12的氢 氧化钠溶液中加水 酸反应氧化钠溶液的氢氧化钠溶液稀释 8.下列各组元素的原子结构示意图中,具有相似化学性质的一组元素是 +10 2 8 +8 2 6 2 8 8 +18 2 8 2 +12 +2 2 +9 2 7 2 8 1 +11 +2 2 A. 和 B. 和 C.和 D. 和 9.小明同学对下列4个实验都设计了两种方案,其中两种方案均合理的是 选项实验目的方案1 方案2 A. 除去氢氧化钠中少量的碳酸钠加水溶解加稀硫酸 B. 清洗铁制品表面的铁锈加稀盐酸用水洗涤 C、鉴别氯化钠溶液和稀盐酸加锌粒加石蕊试液 D. 检验一氧化碳中是否混有少量二氧化碳点燃通入澄清石灰水 10.下列各组物质在水溶液中能够共存,而且加入酚酞显红色的是() A.NaOH 、CuSO4、H2SO4B、NaCl、Na2SO4、Na2CO3 C.NaCl、Ba(NO3)2、HCl D.NH4NO3、NaOH、Na2SO4 11.下列各组物质的溶液混合后,不能发生反应的是() A、NaCl和H2SO4B.NaOH和HCl C.Na2CO3和H2SO4D.AgNO3和NaCl 12.下列除杂试剂和方法使用错误的是 选项物质(括号内为杂质)除杂试剂和方法 A.Cu(Fe2O3)加入稀硫酸,过滤 B.H2(水蒸气)通过浓硫酸,洗气 C.NaOH溶液(Na2CO3)加入石灰水,过滤 D、CaO(CaCO3)加入稀盐酸,过滤 13.除去下列各物质中的少量杂质,所选用的试剂、方法均正确的是(B) 【典型题】高中必修一数学上期末一模试题(带答案) 一、选择题 1.已知集合21,01,2A =--{,,},{}|(1)(2)0B x x x =-+<,则A B =( ) A .{}1,0- B .{}0,1 C .{}1,0,1- D .{}0,1,2 2.已知函数()()2,2 11,22x a x x f x x ?-≥?=???- ? ??? , 满足对任意的实数x 1≠x 2都有()()1212f x f x x x --<0 成立,则实数a 的取值范围为( ) A .(-∞,2) B .13, 8??-∞ ??? C .(-∞,2] D .13,28?? ?? ?? 3.已知0.2 633,log 4,log 2a b c ===,则,,a b c 的大小关系为 ( ) A .c a b << B .c b a << C .b a c << D .b c a << 4.已知0.1 1.1x =, 1.1 0.9y =,2 3 4 log 3 z =,则x ,y ,z 的大小关系是( ) A .x y z >> B .y x z >> C .y z x >> D .x z y >> 5.若函数()2log ,? 0,? 0x x x f x e x >?=?≤? ,则12f f ? ? ??= ? ????? ( ) A . 1e B .e C . 21e D .2e 6.设f(x)=()2,01 ,0 x a x x a x x ?-≤? ?++>?? 若f(0)是f(x)的最小值,则a 的取值范围为( ) A .[-1,2] B .[-1,0] C .[1,2] D .[0,2] 7.把函数()()2log 1f x x =+的图象向右平移一个单位,所得图象与函数()g x 的图象关于直线y x =对称;已知偶函数()h x 满足()()11h x h x -=--,当[]0,1x ∈时, ()()1h x g x =-;若函数()()y k f x h x =?-有五个零点,则正数k 的取值范围是 ( ) A .()3log 2,1 B .[ )3log 2,1 C .61log 2, 2? ? ??? D .61log 2,2 ?? ?? ? 8.用二分法求方程的近似解,求得3 ()29f x x x =+-的部分函数值数据如下表所示:初中化学中考易错题精选[1]
【典型题】高中必修一数学上期末一模试题(带答案)
中考数学易错题汇编及答案