当前位置：文档库 › 开封高中16届高一文科下学期第二次月考试卷

开封高中16届高一文科下学期第二次月考试卷

开封高中2016届高一下期数学试题

一、选择题（每题5分）

1．若(2,1)a =，(3,4)b =，则向量a 在向量b 方向上的投影为（） A ．52 B ．2 C ．5 D ．10 2．将十进制2010化为七进制数是（）

A ．6600（7）

B ．5661（7）

C ．6660（7）

D ．5601（7） 3、在△ABC 中，内角A,B,C 的对边分别是a,b,c ，若22

3a b bc -=，sin 23sin C B =，则A= （） A 0

30 B 0

60 C 0

120 D 0

150 4. 已知函数的部分图象，如图所示，其中，则的解析式为( ) A ．)3

2sin(2π

=x y B. 2sin(2)3

y x π

C. )621sin(2π-=x y

D. )6

21sin(2π

+=x y

5．若函数)6

(sin 2π

=x y 与函数sin 2cos 2y x a x =+的图像的对称轴相同,则实数a 的值为

（） A ．3 B.3- C.

D.33-

6、在ABC ?中，内角A ，B ，C 所对的边分别是c b a ,,，已知8b=5c ，C=2B ，则cosC=

（A ）257 （B ）257- （C ）257± （D ）25

7．如图BC 是单位圆A 的一条直径, F 是线段AB 上的点，且

FC BF 2

=,若DE 是圆A 中绕圆心A 运动的一条直径，则

FD FE ?的值是（）

A ．34-

B ．89

- C.．14- D ．91-

()sin(),f x A x x R ω?=+∈0,0,02

A π

ω?>><<()f x A

o 6

π 12

11π

8.设向量(1,0),(0,1)i j ==，若向量a 满足|2|||5a i a j -+-=，则|2|j a +的取值范围

是（） A ．]3,22[ B. ]22,556[

C. ]4,5[

D.]3,5

6[ 二、填空题（每题5分）

1、设△ABC 的内角A ，B ，C 所对的边分别为a ，b ，c . 若()()a b c a b c ab +-++=，则角C = ．

2、三个数115,161,805的最大公约数是

3、在△ABC 中，D 为边BC 上一点，BD=1

DC ，∠ADB=120°，AD=2，若△ADC 的面积为33-，则∠BAC=_______

4、设错误！未找到引用源。为锐角，若错误！未找到引用源。，则错误！未找到引用源。的值为．

选择题答案填入答题框

1 2

填空题

1 2 3 4

三、解答题（第1题12分，第2,3 题每题14分）

1、在ABC ?中，角,,A B C 所对的边分别为,,a b c ，且满足25cos

A =， 3A

B A C

?=．（I ）求ABC ?的面积；（II ）若1c =，求a 的值．

2、设函数22()(sin cos )2cos (0)f x x x x ωωωω=++>的最小正周期为23

．（Ⅰ）求ω的值．（Ⅱ）若函数()y g x =的图像是由()y f x =的图像向右平移

个单位长度得到，求()y g x =的单调增区间．

3、设函数2()sin(

)2cos 1468

x x

f x ππ

π=--+．（Ⅰ）求()f x 的最小正周期．（Ⅱ）若函数()y g x =与()y f x =的图像关于直线1x =对称，求当4

[0,]3

x ∈时()y g x =的最大值．

参考答案选择题BDAADABD 填空题

1.2

π 2. 23 3.

π 4.

172

解答题

1.（1）2 （2）25

2.（1）

ω=（2）

5212

,()

123123

k k

k z

ππ

-+-+∈

3.（1）8 （2）

3 2

高一英语月月考试卷

高一英语12月月考试卷注意：1-75题填涂在答题卡上，从76开始做在答题卷上。考试时间110分钟。听力部分：（共20分）第一节（共5小题；每小题1分，满分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。 1. When is Betty leaving for Guangzhou? A. Next Thursday evening. B. This Thursday evening. C. Next Tuesday evening. 2. Which season was it when the conversation took place? A. Spring. B. Winter. C. Summer. 3. When was the fire put out? A. At 1:00. B. At 4:00. C. At 3:00. 4.When will the woman go to dinner? A. Next Saturday. B. Next Sunday. C. On the man’s birthday. 5. What does the man think of the exam? A. It wasn't too difficult. B. It was too easy. C. It was very difficult. 第二节（共15小题；每小题1分，满分15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，并标在试卷的相应位置。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。听下面一段对话，回答第6~8题。 6. Where are Kate and Torn? A. In Kate's office. B. In Tom’s house. C. In a classroom. 7. Why did Tom come in? A. He worked there. B. He wanted to talk to Kate. C. He wanted to have a letter typed. 8. What was Jane doing at that time? A. She was taking a rest. B. She was preparing for an exam. C. She was taking an exam. 听下面一段对话，回答9~11题。 9.How much did the woman’s package post cost? A. $10.80. B. $5.90. C. $5.94. 10.Which way did the woman get to mail her package? A. First class. B. A cheaper way. C. An expensive way. 11. Where did they have a talk? A. At a post office. B. At a railway station. C. At New York airport. 听下面一段对话，回答第12~14题。 12.Where did they have a dinner that night?

人教版高中物理必修一高一第二次月考试题()

5．如图所示为某质点做直线运动的速度—时间图象，下列说法正确的是A．质点始终向同一方向运动 B．质点在第2s末的运动方向发生变化 C．2s到4s内一直做匀加速直线运动 D．4s内一直做匀减速直线运动 6．在做“互成角度的共点力的合成”的实验中，将橡皮条的一端固定，另一端在力F1、F2的共同作用下被拉至O点，如图所示．现保持橡皮条被拉至O点不动，F2的方向不变，改变F1的大小和方向，在F1和F2之间的夹角由钝角逐渐减小为锐角的过程中，F1的大小将 A．一直减小 B．一直增大 C．先增大后减小 D．先减小后增大 7．从20m高的楼房的阳台上以20m/s的初速度竖直向上抛出一小球，不计空气阻力，g取10m/s2，求小球运动到离抛出点15m处所经历的时间可能是 A．1s B．2s C．3s D．(27)s 8．如图，甲、乙两人分别在两岸用绳拉小船在河流中行驶，已知甲的拉力大小为800N，方向与航向夹角为30°。要保持小船能在河流正中间沿直线行驶，则乙用力最小为 A．与F甲垂直，大小为400N B．与F甲垂直，大小为8003/3 N C．与河岸垂直，大小为400N D．与河岸垂直，大小为4003N 9．如图，粗糙的水平地面上有一斜劈，斜劈上一物块正在沿斜面以速度v0匀速下滑，斜劈保持静止，则地面对斜劈的摩擦力 A．等于零 B．不为零，方向向右 C．不为零，方向向左 D．不为零，v0较大时方向向左，v0较小时方向向右 10．如图所示，质量为m的滑块在水平面上向左撞向弹簧，当滑块将弹簧压缩了x0时速度减小到零，然后弹簧又将滑块向右推开。已知弹簧的劲度系数为k，滑块与水平面间的动摩擦因数为μ，整个过程弹簧未超过弹性限度，则 A．滑块向左运动过程中，始终做减速运动 B．滑块向右运动过程中，始终做加速运动

高一下学期数学第一次在线月考试卷第1套真题

高一下学期数学第一次在线月考试卷一、单选题 1. 已知集合A={x|x＞l}，则下列关系中正确的是（） A . B . C . D . 2. 下列函数中，既是偶函数，又是（0，+∞）上的减函数的是（） A . B . C . D . 3. sin600°=（） A . B . C . D . 4. 下列函数中，最小正周期为的奇函数是（） A . B . C . D . 5. 要得到函数f（x）=cos（2x- ）的图象，只需将函数g（x）=cos2x 的图象（） A . 向左平移个单位长度 B . 向右平移个单位长度 C . 向左平移单位长度 D . 向右平移个单位长度 6. 已知函数，则（） A . 4 B . 1 C . 0 D . 7. 函数的零点所在的区间是（） A . B . C . D . 8. 已知幂函数的图象过点，若 ,则实数的值为（）

A . 9 B . 12 C . 27 D . 81 9. 已知，，，则，，的大小关系是（） A . B . C . D . 10. 已知函数在上为增函数，则实数的取值范围是（） A . B . C . D . 11. 已知全集为，函数的定义域为集合，且，则的取值范围是（） A . B . C . 或 D . 或 12. 已知定义在上的函数在上是减函数，若是奇函数，且，则不等式的解集是（） A . B . C . D . 二、填空题 13. 已知函数图象恒过点，则点坐标为________. 14. 计算的值为________. 15. 若函数在区间上单调递减，则实数的取值范围是________． 16. 衣柜里的樟脑丸随着时间推移会挥发而体积变小,若它的体积随

高一数学上学期第一次月考试卷及答案

绵阳中学高级第一学期第一学月考试数学试题一、选择题（每小题4分，共40分） 1．下列各组函数中，表示同一个函数的是（） A ．(),()f x x g x == B ．2()()f x g x = = C ．21 (),()11 x f x g x x x -= =+- D ．()1 1,()f x x g x = -=2．设集合{} 32M m m m Z =-<<∈且，{} 13N n n n Z =-≤≤∈且，则M N = （） A ．{}0,1 B ．{}1,0,1- C ．{}0,1,2 D ．{}1,0,1.2- 3．设函数221(1) ()2(1)x x f x x x x ?-≤=?+->? ，则1( )(2)f f =（） A ． 15 16 B ．2716 - C ． 89 D ．16 4．函数0()(2)f x x =+-的定义域是（） A ．{} 1x x ≥- B ．{} 12x x x ≥-≠且 C ．{} 12x x x >-≠且 D ．{} 1x x >- 6．设全集{}{} ,0,1U R A x x B x x ==>=<-，则()()U U A B B A =????????（） A ．? B ．{} 0x x ≤ C ．{} 1x x >- D ．{} 01x x x ><-或 7．设{}12345,,,,M a a a a a ?且{}{}12312,,,M a a a a a =，则集合M 的个数是（）

A ．1 B ．2 C ．3 D ．4 8．设全集U R =，{} {}2 21,M x y x N y y x ==+==-，则M 和N 的关系是（） A ．M N ?≠ B ．N M ?≠ C ．M N = D ．{}(1,1)M N =- 9．设函数()f x 在(1,1)-上是奇函数，且在（－1，1）上是减函数，若(1)()0f m f m -+-<，则m 的取值范围是（） A ．1(0,)2 B ．(1,1)- C ．1(1,)2 - D ．1(1,0) (1,)2 - 10．设()f x 是(,)-∞+∞上的奇函数，(2)()f x f x +=-，当01x ≤≤时，()f x x =，则 (3.5)f =（） A ．0.5 B ．－1.5 C ．－0.5 D ．－1.5 二、填空题（每小题4分，共20分） 11．设全集 {}{}23,4,5,3,1a a A a =-+-=-且 {}1U A =，则实数a = 。 12．设()f x 是偶函数，当0x <时，()(1)f x x x =+，则当0x >时， ()f x = 。 13．设函数2 ()2f x x ax =-+与()a g x x =在区间[]1,2上都是减函数，则实数a 的取值范围是。 14．函数y =的增区间是。 15．若函数 y = 的定义域是R ，则实数a 的取值范围是。

高中英语月考试卷(简单卷)

铜陵英才学校高一年级9月月考英语第一部分听力(共两节, 满分30分) 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个小题。每段对话仅读一遍。 1.Whom was the CD bought for? A.David B.Alice C.Lucy 2.Why did the man come to the United States? A.To visit his family B.To study C.To travel 3.What’s the weather probably like now? A.Sunny B.Cloudy C.Rainy 4.What does the woman really want to do? A.Take a good test B.Go to Beijing C.Go to work 5.What day is it today? A.Tuesday B.Thursday C.Friday 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，并标在试卷的相应位置。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，每小题将给出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.What does the woman think of playing outdoors? A.It’s a waste of time B.It’s helpful C.It’s boring 7.What are the speakers talking about?

高一化学上学期月考试卷A卷

黑龙江省青冈县2016-2017学年高一化学上学期月考试卷（A卷）一、单项选择题（每题三分，共54分） 1、下列仪器不能用酒精灯直接加热的是 ①烧杯②坩埚③蒸发皿④试管⑤蒸馏烧瓶⑥锥形瓶⑦燃烧匙 A．③⑥⑦ B．①⑤⑥ C．⑤⑥⑦ D．①⑤ 2、现有①MgSO4，②Ba(NO3)2，③NaOH，④CuCl2，⑤KCl五种溶液，不加任何其他试剂，可鉴别且鉴别的先后顺序也正确的是 A．④③②①⑤ B．④⑤③②① C．④③①②⑤ D．④②③①⑤ 3、下列变化中，必须加入氧化剂才能发生的是 A．SO2→S B．SO32—→SO2 C．I—→I2 D．HCO3—→CO32— 4．下列各组物质，前者属于电解质，后者属于非电解质的是 A．NaCl、BaSO4 B．铜、二氧化硫 C．KOH、蔗糖 D．KNO3、硫酸溶液 5、已知：2FeCl3＋2KI===2FeCl2＋2KCl＋I2，2FeCl2＋Cl2===2FeCl3，2KMnO4＋16HCl===2KCl＋2MnCl2＋5Cl2↑＋8H2O。若某溶液中有Fe2＋、I－和Cl－，要氧化除去I－而不影响Fe2＋和 Cl－，可加入的试剂是 A．Cl2 B．KMnO4 C．FeCl3 D．HCl 6、下列各组离子在溶液中能大量共存，加入OH－有沉淀生成，加入H+有气体生成的一组离子是 A．K＋、Mg2＋、Cl－、HCO－3 B．K＋、Cu2＋、SO2－4、Na＋ C．NH＋4、CO2－3、NO－3、Na＋D．NH＋4、Cl－、HCO－3、K＋ 7．使用容量瓶配制溶液时，由于操作不当，会引起误差，下列情况会使所配溶液浓度偏低的是 ①用天平（使用游码）称量时，被称量物与砝码的位置放颠倒了 ②有些固体溶解会放热，若未经冷却即转移至容量瓶 ③溶液转移到容量瓶后，烧杯及玻璃棒未用蒸馏水洗涤 ④转移溶液前容量瓶内有少量蒸馏水 ⑤定容时，仰视容量瓶的刻度线 ⑥定容后摇匀，发现液面降低，又补加少量水，重新达到刻度线 A．①③⑤⑥B．①②⑤⑥

人教版高中英语必修一月考试题

高一英语第一次月考试题一．单项选择 1 He commanded that the students_____ the classroom before he returned. A.didn’t leave B.wouldn’t leave C.needn’t leave D. not leave 2 ---What do you think ______an important part in their lives? ---Folk music. A. plays B. takes C makes D.acts 3 I was so excited as to ________ for the whole night. A. hold awake B. stay awake C. hold wake D. stay wake 4 it rains tomorrow, we’ll start out. A. If B. As if C. Even if D. Even 5 The policeman asked with the old women. A. what the matter was B. what was the matter C. what matter was D. what was the wrong 6 get a good seat, he set out early after supper. A. In order to B. So that C. So as to D. In order that 7 China Daily is ____ a newspaper, for it can also serve as a useful textbook for English study. A. more than B. more or less C. less than D. more and more 8 _____ of the students who took part in the military training is 450. A. A number B. A lot C. Lots D. The number 9 He realized she was crying ________ what he had said. A. because B. because of C. as D. since 10 ------You haven’t done it well. ------ But I tried my best and did it___ the way_____ I think is the best. A. in; which B. /; in which C. by; in that D. in; / 11 It is so nice to hear from her, ___, we last met more than 30 years ago. A. what’s more B. that’s to say C. in other words D. believe it or not 12. When we visited Zhangzhuang again ten years later, we found it changed so much that we could hardly ________ it. A. remember B. think about C. believe D. recognize 13.The policeman warned the drive ________ so carelessly. A. never to drive B. to never drive C. to not drive D. doesn’t drive 14. The office ordered his soldiers ________. A. to stand still B. to not stand still C. not stand still D. stand still 15.Xiao Hong worked harder last year. _______ , she still didn’t get high grades. A. As a result B. After all C. By the way D. However 16. Please tell me the way you thought of _______ the garden. A. take care of B. to take care of C. taking care of D. to take care 17 When I met the little boy_______,I found he was clever. A．the first time B. for the first time C. the first D. for the first 18 It is on 1st September________students go back to school every year. A. when B. that C. who D.what 19 They get along_______with each other because they often quarrel. A.well B.nicely C.badly D.bad 20 With the development of the society, I think________important to learn English well. A. that B. this C. it D.one

高一上学期第一次月考试卷真题

高一上学期第一次月考试卷一、完形填空 1. 完形填空 Once a boy really had everything he wanted, so he was1interested in the rarest objects. One day he2a mysterious mirror and took it home. When he looked into the mirror, he found that his 3looked very sad. He tried 4, but it remained the same. Surprised, the boy went off to buy some sweets. He went home and looked into the mirror as happily as possible, 5he still looked sad. He bought all kinds of toys, but he looked forever 6in that mirror. So the boy put the mirror away in a 7. “What a8mirror! I’ve never seen a mirror that didn’t 9properly!” That same afternoon he went out to play, but on his 10to the park he saw a little girl crying loudly. So he went over to see what was happening. The little girl told him that she had 11her parents. Together, they 12in search of them. As the little girl continued crying, the boy 13his money in buying sweets lo cheer her up.14after walking for a long time, they found her parents, who looked very worried. The boy said goodbye, and walked off towards the park. However,15the time, he decided to turn around and head 16home, as he had no time to 17. At home, he went to his room and noticed a shining 18in the comer where he had

职业高中高中二年级英语月考试卷(含答案)

2015年上学期高二英语5月份考试试卷考试总分：150分考试时间：120分钟一、单项选择（共30题，每小题1分，共30分） ( )1. How do you study _____ a test? -- I study _____ making flashcards A. by, for B .for ,for C. for , by D. by , by ( )2.Don’t make so much _______ ! I can’t hear the t elephone. A .sound B .shout C . voice D. noise ( )3.– Hello! Would you like to go the party with me tonight? –I’m sorry I can’t . Mother won’t ______me to go out in the evening . A. let B. allow C. offer D .ask ( )4.--Don’t ______ too late , or you will reel tired in class -- I won’t , Mum . Good night! A. wake up B. get up C. stand up D. stay up ( )5.I wanted to do my homework last night , but ended up ________ to the cinema. A .go B. to go C. going D. went ( )6.He preferred to sit rather than __________ A .sleep B. sleeping C. sleeps D. to sleeping ( )7.You look tired .______ working indoors you should be out for a walk. A .Because of B. Instead of C. Thanks to D. As for ( )8. _______wonderful advice you have just _______me! A. How; told B. What a; given C. How a; sent D. What; given ( )9.. --do you often hear Lucy ________in her room? -- Yes, listen! Now we can hear ________her in her room. A. sing; sing B. singing; singing C. singing; sing D. sing; singing ( )10.I __________ be afraid to sleep alone in my room, but now I _________ sleeping there alone. A Was used to, used to B used to, am used to C used to , used to D am used to , used to ( )11. Dongying_________ a lot in the last 3 years .It’s now one of the important cities in Shandong. A .changed B. changes C. has changed D. had changed ( )12.Jack is afraid of flying . He feels ________ before he gets on a plane. surprised B excited C patient D nervous ( )13.He _________ for two years. We are still sad about his _________. A died, dead B died , death C has been dead , dead D has been dead, death ( )14._____ the waiter didn’t understand what the old lady was saying , he knew what she wanted. A. Unless B. Because of C. Even though D. Because ( )15.Good parents should be _______ with their children. A. patient B .frustrated C .unfair D. funny ( )16.People ,especially teens, think it ______great fun to surf on ________Internet. A.a;the B.a;/ C./;the D.the;the ( )17.---Don’t _____too late,or you will feel tired in class. -----I won’t ,Mum. Good night! A. wake up B. get up C. stand up D. stay up ( )18.There’s a smile on the teacher’s face. I think she’s ______our work. A. worried about B. pleased with C. sorry for D. afraid of ( )19.---Have you found ______here in the room? ----Everything is OK ______the broken window. A. special thing; except B. anything special; besides C. special thing; besides D. anything special; except ( )20.None of the shoes in the shops are the right size. They are _____too big ____too small. A. both; and B. neither; nor C. either ;or D. not only; but also ( )21.The price of this computer is the _______of the three. A. smallest B. biggest C. highest D. tallest ( )22.No one can be sure ________in a million years. A. what will man look like B. what will happen on the earth C. where will humans live D. how many people are there in the world ( )23.A neighbor helped to keep our dog. It _______while we were on holidays. A. was taken good care of B. took good care of C. is taken good care of D. takes good care of ( )24.---What delicious bread! ---It would taste _______with jam. A. well B. good C. better D. delicious ( )25.Not only Tom but also his brother _______the Greener China for two years . A. has become a member of B. have joined C. have been a member of D. has been in ( )26.----Have you seen my toy car, Bill ? ----It’s ______my way, so I put it ______. A.in; away B. on; out C. in; out D. by; away ( )27.After school I found Mother was in bed sick. _____Mother was ill, I should do something for her. A. So B. Though C. Since D. If ( )28.------_______weather it is today !Let’s go out for a walk. ------That sounds good! A. How fine B. How bad C. What a fine D. What fine ( )29.-----What should I do, doctor ? -----______healthy, you should take more exercise. A. Keep B. Keeping C. To keep D. Having kept ( )30.----Must we finish giving out the posters today? -----Yes, we _______.It can’t be put off any longer. A.can B. may C. must D. needn’t 二、完形填空（20题，每题1分，共20分） In order to be a success in the American business wor ld, you must “get along” with people. You must learn to conduct yourself in such a way _31_ you earn the affection and respect of others._32_ we have already pointed out, Americans_33_ business and pleasure. Therefore, learning how to _34_ informally can be a help with your American business _35_.Americans like to talk about a _36_of different topics—sports, politics, cars, popular movies and television shows and personal

高一第二次月考试题

2016-2017学年高一上学期12月月考本试题分第I卷（选择题）和第II卷（非选择题）两部分。可能用到的相对原子质量：H:1 C:12 N:14 O:16 Na:23 Mg:24 Al:27 S:32 Cl:35.5 K:39 Ca:40 Mn:55 Cu:64 Ag:108 I:127 Ba:137 第I卷选择题一、选择题：本大题共15小题．每小题3分，共45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.化学与生产、生活、环境等社会实际密切相关。下列叙述正确的是( ) A．“滴水石穿、绳锯木断”不涉及化学变化 B．明矾净水的原理和“84”消毒液消毒的原理不相同 C．氟利昂作制冷剂会加剧雾霾天气的形成 D．汽车尾气中含有的氮氧化物，是汽油不完全燃烧造成的 2.卫生部发生公告，自2011年5月1日起，禁止在面粉生产中添加过氧化钙(CaO2)等食品添加剂。下列对于过氧化钙(CaO 2)的叙述错误的是( ) A．CaO2具有氧化性，对面粉可能具有漂白作用 B．CaO2中阴阳离子的个数比为1: 1 C．CaO2和水反应时，每产生1 mol O2转移电子4 mol D．CaO2和CO2反应的化学方程式为：2CaO2＋2CO2===2CaCO3＋O2 3．某硫酸厂废气中SO2的回收利用方案如下图所示，下列说法不正确的是( ) A．X可能含有2种盐B．a是SO3 C．Y可能含有(NH4)2SO4 D．(NH4)2S2O8中S的化合价不可能为+7 4.同温同压下，下列气体的质量都相同，其中体积最大的是( ) A.NH3 B. HCl C.SO2 D.CH4

5. 下列叙述正确的是 A．含氧酸可作氧化剂而无氧酸不能 B．反应中还原剂所含元素化合价降低越多，其还原性越强 C．某物质氧化性越弱，其还原性越强 D．已知还原性：Fe2＋＞Br－，可知反应2Fe3＋＋2Br－===2Fe2＋＋Br2不能进行 6.将一定体积的CO2通入V L NaOH溶液中，已知NaOH完全反应，若在反应后的溶液中加入足量石灰水，得到a g沉淀；若在反应后的溶液中加入足量CaCl2溶液，得到b g沉淀，则下列说法正确的是( ) A．参加反应的CO2的体积为0.224 a L B．用上述数据不能确定NaOH溶液的物质的量浓度 C．若a=b，则CO2与NaOH溶液反应的产物盐只有Na2CO3 D．b可能等于a、小于a或大于a 7.在pH=1的无色溶液中能大量共存的离子组是（） A．K+．Na+．CO32-．Cl-B．Na+．K+．Cl-．SO42- C．Al3+．Fe3+．SO42-．Cl-D．Ba2+．K+．OH-．NO3- 8.某兴趣小组探究SO2气体还原Fe3＋，他们使用的药品和装置如下图所示，下列说法不合理的是()。 A．能表明I－的还原性弱于SO2的现象是B中蓝色溶液退色 B．装置C的作用是吸收SO2尾气，防止污染空气 C．为了验证A中发生了氧化还原反应，加入用稀盐酸酸化的BaCl2溶液，产生白色沉淀D．为了验证A中发生了氧化还原反应，加入KMnO4溶液，紫红色退去 9.下列指定反应的离子方程式书写正确的是（） A．碳酸钙溶于醋酸溶液：CaCO3+2H+=Ca2++CO2↑+H2O B．铜溶于硫酸酸化的H2O2溶液:Cu+2H++H2O2=Cu2++2H2O C．少量SO2通人氨水中：SO2+NH3·H2O=NH4+＋HSO3-