1.选择题- (共5题)
1.实验室用含杂质的锌运稀硫酸反应制取氢气，取8g含杂质的锌粒于烧杯中（所含杂质不溶于水，也不与酸反应），向其中加入74.2g稀硫酸，恰好完全反应后烧杯内剩余物质的质量为82g．计算：
2.实验室用含杂质的锌运稀硫酸反应制取氢气，取8g含杂质的锌粒于烧杯中（所含杂质不溶于水，也不与酸反应），向其中加入74.2g稀硫酸，恰好完全反应后烧杯内剩余物质的质量为82g．计算：
4.下列除杂，分离提纯的方法或选用的试剂不正确的是（ ）
选项 | 物质 | 所含杂质 | 除去杂质的方法 |
A | 硝酸钾 | 少量氯化钠 | 重结晶 |
B | N2 | O2 | 通过灼热的铜网 |
C | CaCl2溶液 | 稀盐酸 | 加入过量碳酸钙，过滤 |
D | Fe | 铁锈 | 稀硫酸 |
2.单项选择- (共7题)
6.
These flowers should not be watered too ______, once _____.
| A．long; every other day | B．often; every fourth day |
| C．soon; every two days | D．frequently; each five days |
7.
Our neighbor has ______ ours.
| A．as a big house | B．as big a house as |
| C．the same big house | D．a house the same big as |
8.
It is said that the software on learning subjects for pupils in a very practical way.
| A．designed | B．designing | C．are designed | D．is designed |
9.
The chief editor expressed his doubt _______ senior people would enjoy reading such magazines.
| A．which | B．how | C．whether | D．that |
10.
— It is said that the famous cyclist_________ his parents is to visit our city next week.
—I heard the news _________.
—I heard the news _________.
| A．and; too | B．as well as; as well | C．as well as; as well as | D．with; either |
11.
The computer, help we human beings have stepped into the information age, should be regarded as one of the most important inventions in the 20thcentury.
| A．which | B．whose | C．with its | D．with whose |
试卷分析
-
【1】题量占比
选择题:(5道)
单项选择:(7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：0
5星难题：0
6星难题：7
7星难题：0
8星难题：0
9星难题：0