1.选择题- (共6题)
1.
分离、提纯是化学实验的重要环节，下列实验设计不能达到实验目的是（ ）
实验目的 | 实验设计 | |
A | 除去CO中的少量H2O和CO2 | 先通过浓硫酸，再通过氢氧化钠溶液 |
B | 除去NaCl固体中的少量Na2CO3 | 先加足量水溶解，再加适量稀盐酸，蒸发结晶 |
C | 除去KNO3溶液中的少量K2SO4 | 加入适量的Ba（NO3）2溶液，过滤 |
D | 除去铜粉中混有的少量铁粉 | 用磁铁吸引 |
2.
分离、提纯是化学实验的重要环节，下列实验设计不能达到实验目的是（ ）
实验目的 | 实验设计 | |
A | 除去CO中的少量H2O和CO2 | 先通过浓硫酸，再通过氢氧化钠溶液 |
B | 除去NaCl固体中的少量Na2CO3 | 先加足量水溶解，再加适量稀盐酸，蒸发结晶 |
C | 除去KNO3溶液中的少量K2SO4 | 加入适量的Ba（NO3）2溶液，过滤 |
D | 除去铜粉中混有的少量铁粉 | 用磁铁吸引 |
3.
把X、Y、Z三种金属分别放入稀盐酸中，X、Y溶解并有气泡产生，Z不反应，取过量X放入Y（NO3）2和Z（NO3）2的混合溶液中充分反应后过滤，经检验，滤渣中只有X、Z．则X、Y、Z三种金属的活动性由强到弱的顺序是（ ）
6.
如图所示，用塔式起重机上的滑轮组匀速起吊6000N的物体，物体上升5m所用的时间为10s，滑轮组的机械效率是80%，则有用功是 {#blank#}1{#/blank#} J，总功是 {#blank#}2{#/blank#} J，拉力F的功率是 {#blank#}3{#/blank#} W．
2.单项选择- (共10题)
7.
In recent years travel agencies have succeeded in selling us the idea that ________, the better our holidays will be.
| A．we go the farther | B．the farther we go |
| C．the father we will go | D．the farther do we go |
8.
In his first speech as victor, Obama said, “There are many who won’t agree with every decision or policy I make as ________ president, and we know that government can’t solve every problem. But I will always be honest with you about ________ challenges we face.”
| A．a; / | B．the; the | C．/; the | D．the; / |
9.
The world’s population has grown by ______ it was in 1800.
| A．more than six times that | B．six times more than that |
| C．more than six times what | D．six times as many as |
10.
The man _______ over there was injured in a car accident yesterday.
| A．operate on | B．being operated on | C．to operate on | D．being operated |
11.
The old farmer had his leg _______ but he had his tractors _______ day and night.
| A．hurting; working | B．hurting; worked | C．hurt; working | D．hurt; worked |
12.
With so many forms _______, many students feel at a loss before the 2010 college entrance exam.
| A．to fill in | B．filled in | C．filling in | D．to be filled in |
13.
The ______ look on the manager’s face suggested that he _______ to overcome the difficulty.
| A．determined; be determined | B．determined; was determined |
| C．determining; determine | D．determining; determined |
14.
______ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
| A．If | B．As | C．Because | D．While |
15.
______ home yesterday afternoon, it began to rain heavily.
| A．On my arrival | B．On arriving | C．While I got | D．When I got |
试卷分析
-
【1】题量占比
选择题:(6道)
单项选择:(10道)
-
【2】：难度分析
1星难题：0
2星难题：0
3星难题：0
4星难题：4
5星难题：0
6星难题：5
7星难题：0
8星难题：1
9星难题：0