1.选择题- (共10题)
1.正长石是一种天然的硅酸盐矿，其组成可看作SiO2中部分Si原子被Al、K原子取代而成．当有25%的Si原子被Al原子取代（不足的价数由K原子补充）时，正长石的化学组成可表示为{#blank#}1{#/blank#}（填字母序号）．
A．KAlSiO4 B．KAlSi2O6 C．KAlSi3O8 D．KAlSi4O10
该正长石用二氧化硅和金属氧化物形式来表示，其组成为{#blank#}2{#/blank#}．
2.正长石是一种天然的硅酸盐矿，其组成可看作SiO2中部分Si原子被Al、K原子取代而成．当有25%的Si原子被Al原子取代（不足的价数由K原子补充）时，正长石的化学组成可表示为{#blank#}1{#/blank#}（填字母序号）．
A．KAlSiO4 B．KAlSi2O6 C．KAlSi3O8 D．KAlSi4O10
该正长石用二氧化硅和金属氧化物形式来表示，其组成为{#blank#}2{#/blank#}．
6.“9•11”事件已过去多年，但其留给人们的伤害还存在．科学家曾警告说，随着美国世贸大厦的轰然倒下，原来在建筑大厦时用的大量石棉将释放出来污染环境（石棉有毒，能使人患肺癌）．石棉是一种具有压伸强度大、柔韧性强、耐热、耐火焰、耐酸碱腐蚀、价格低廉的硅酸盐．完成下列问题：
2.单项选择- (共13题)
11.
The 1930s __________ the suffering of the Chinese from war.
| A．wrote | B．witnessed | C．proved | D．supplied |
12.
The meeting _________ next week is sure to be a great success.
| A．to hold | B．to be hold | C．to have held | D．being held |
13.
They are going to find a new approach ______these complex problems.
| A．to solving | B．to solve | C．in solving | D．solves |
14.
The library needs _______, but it’ll have to wait until Sunday.
| A．cleaning | B．be cleaned |
| C．clean | D．being cleaned |
15.
to take my English textbook, I had to borrow one from a schoolmate.
| A．Forget | B．To have forgotten |
| C．Forgotten | D．Having forgotten |
16.
I’m sorry to tell you that we decided __________ your plan.
| A．to abandon | B．abandoning | C．to quit | D．quitting |
17.
That dog ought to be destroyed ______ it attacks any more children.
| A．until | B．since | C．after | D．before |
18.
It __________ me that she just expects me to help, but I had so many things to do today.
| A．annoys | B．surprises | C．excites | D．delights |
19.
He ________ his position because he had been offered a better job.
| A．resigned | B．retired | C．dismissed | D．fired |
20.
After working for two years, Tim Martin was ___ as the top manager in charge of the company.
| A．ranked | B．appointed | C．recognized | D．classified |
21.
We all thinks that Jack ____________ for his son’s bad performance at school.
| A．is to blame | B．is to be blame | C．are to be blamed | D．are be blame |
22.
It was the news _________ he got the first prize ________ made his father excited.
| A．that; that | B．which; which | C．which; that | D．that; which |
试卷分析
-
【1】题量占比
选择题:(10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：2
7星难题：0
8星难题：10
9星难题：1