问题 单项选择题

我国是世界13个贫水国家之一,全国600多个城市半数以上缺水,其中108个城市严重缺水。地表水资源的稀缺造成对地下水的过量的开采,地下水资源已近枯竭。据测算,我国淡水资源还不到世界人均水量的:

A.1/7

B.1/6

C.1/4

D.1/3

答案

参考答案:C

解析: 中国水资源总量丰富,但人均水资源占有量仅相当于世界人均水资源占有量的1/4,位列世界第121位,是联合国认定的“水资源紧缺”国家。故本题答案选C。

阅读理解

阅读理解

     Good morning. I am Professor Armstrong, and I am your laboratory instructor .This class is intended

as a necessary part of the course, which Dr Smith will be in charge of. This class will meet twice a week .

This laboratory begins at nine. I expect you to be on time. I do not intend to wait for the latecomers or

repeat what has already been cohered if you miss the explanation. And do not arrive late and interrupt

your neighbor. You may as well not come if you can't be on time.

     Attendance is equally important. If you miss three lab classes, you're dropped from the labs-no excuses. You can't complete the course without completing the lab.

     Besides, safety is key here. It's very important to keep things neat and clean, dress properly, and be

careful. You may not eat, drink or smoke in the laboratory and you should always clean the counter and

wash your hands both before and after the class. Long hair must be tied back. Large clothing must not be worn.  Any laboratory accident must be reported immediately.

     I hope you'll enjoy the laboratory. It's a wonderful place, and all the requirements I've just mentioned

are to be followed. We will begin today by learning about the microscope.

1. According to the passage how will be the latecomers be treated?

A.They will be allowed to enter the class and the teacher will repeat information for them.

B. They had better come quietly as long as they don't interrupt their neighbor.

C. They will be dropped from the class if they are late three times.

D. They will not be given any special consideration.

2. According to the passage what happens if a student misses three classes?

A. He can make up the classes.

B. He will be dropped from the class.

C. He may be allowed to remain if he has a good excuse.

D. He can't complete the lab without completing the course.

3. What should you do if you wear long hair?

A. You must have it tied back.

B. You have to cut it.

C. You will be asked to leave class.

D. You may as well not come to the lab.

4. According to the requirements which of the following isn't right?

A. You must report it immediately if there is any laboratory accident happens.

B. Don't eat, drink or smoke in the laboratory.

C. You can dress whatever you like.

D. Wash your hands both before and after the class.

单项选择题