1.选择题- (共13题)
8.粗还原铁粉是一种重要的化工原料，某兴趣小组对其进行下列研究：
[物质制备]利用绿矾制备精还原铁粉的工艺流程如下： 
粗还原铁粉中还含有少量铁的氧化物和Fe3C，可用氢气在高温下进一步还原，其反应方程式为：FexOY+yH2 {#mathml#}{#/mathml#} xFe+yH2O Fe3C+2H2 {#mathml#}{#/mathml#} 3Fe+CH4
9.粗还原铁粉是一种重要的化工原料，某兴趣小组对其进行下列研究：
[物质制备]利用绿矾制备精还原铁粉的工艺流程如下：
粗还原铁粉中还含有少量铁的氧化物和Fe3C，可用氢气在高温下进一步还原，其反应方程式为：FexOY+yH2 {#mathml#}{#/mathml#} xFe+yH2O Fe3C+2H2 {#mathml#}{#/mathml#} 3Fe+CH4
11.自然界有一种含镁矿石，其化学组成可表示为xMgCO3．yMg（OH）2（x、y为正整数）．取两份等质量的样品，一份加过量盐酸生成气体8.8g；另一份加热至完全分解得到固体MgO的质量为10g．下列x，y的关系正确的是（ ）
12.自然界有一种含镁矿石，其化学组成可表示为xMgCO3．yMg（OH）2（x、y为正整数）．取两份等质量的样品，一份加过量盐酸生成气体8.8g；另一份加热至完全分解得到固体MgO的质量为10g．下列x，y的关系正确的是（ ）
13.自然界有一种含镁矿石，其化学组成可表示为xMgCO3．yMg（OH）2（x、y为正整数）．取两份等质量的样品，一份加过量盐酸生成气体8.8g；另一份加热至完全分解得到固体MgO的质量为10g．下列x，y的关系正确的是（ ）
2.单项选择- (共13题)
14.
Emmett hasn’t got enough ______ to remove that stone. He is only 10.
| A．energy | B．strength | C．pressure | D．force |
15.
Our experiment had got into _____trouble, so we decided to take _____ chance and add more water, and luckily, we succeeded.
| A．/ ; / | B．/ ; a | C．the; a | D．a; a |
16.
I didn’t see her in the meeting room this morning. She _____ at the meeting.
| A．mustn’t have spoken | B．shouldn’t have spoken |
| C．needn’t have spoken | D．couldn’t have spoken |
17.
________ you interrupt now? Can’t you see I’m on the phone?
_ Sorry, Sir, but it’s urgent.
_ Sorry, Sir, but it’s urgent.
| A．Can | B．Should | C．Must | D．Would |
19.
–Would you permit me ______here?
- Sorry, we don’t permit _____ here in the reading room.
- Sorry, we don’t permit _____ here in the reading room.
| A．smoking; smoking | B．to smoke; to smoke |
| C．smoking; to smoke | D．to smoke; smoking |
20.
______ nice and delicious, the fried chicken was soon sold out.
| A．Tasted | B．Being tasted | C．Tasting | D．To taste |
21.
It seems that Jenny is a(n)______lady, for she always works more than 12hours a day.
| A．confident | B．sensitive | C．lively | D．energetic |
22.
—Did you listen to Mr Jackson's lecture?
—Yes, I have never heard a ______ one.
—Yes, I have never heard a ______ one.
| A．more exciting | B．more excited | C．most exciting | D．most excited |
24.
The important thing is _______ a man does, not ______ he says.
| A．that; what | B．what; that | C．what; what | D．that; that |
25.
Great changes ______ in my school in the past ten years.
| A．took place | B．were taken place |
| C．have taken place | D．have been taken place |
试卷分析
-
【1】题量占比
选择题:(13道)
单项选择:(13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：13
7星难题：0
8星难题：0
9星难题：0