问题 填空题

我们知道,在国际单位制中,长度的基本单位是米,其它单位还有:千米、分  米、厘米、毫米、微米、纳米和光年.银河系很大,一般用 ______作长度单位表示最方便;而分子直径很小,一般用 ______长度单位表示最方便.

答案

(1)因为星体间的距离较远,用较小的长度单位表示不方便,所以一般用较大长度单位光年来表示;

(2)对于很小的长度(分子、原子、电子等的直径)一般用较小的长度单位纳米来表示较方便;

故答案为:光年;纳米.

听力题

1、What you think is proper in your own country may not be proper in another because of             c__________ difference.

2、They have decided to d___________ the evidence immediately they found there was no chance of breaking through.

3、An earthquake left the whole city in ________ (废墟)

4、On the exhibition , you can see many treasures found in an ancient s____________ ship

5、The electors d_____against the new rules and refused to sign their names on these documents.

6、We need to become a u____________ team to reach our long-term goals.

7、The strike left the railway system in c_______________

8、Are there any s_____________ between these two paintings?

9、The ___________(形成)of national character doesn’t take place in one day.

10、The elderly are usually ________( 担心的) about the growth of the younger generation

11、The war cost an  _______________( 巨大的,庞大的)sum of money.

12、The ship is not in a  _______________( 状态,状况,条件)to make a long voyage.

13、The laborers prepared to resist and to ______________(推翻)this Government.

14、I’d like to see all the legal d_____ concerning the sale of this land before we sign this paper.

15、Literature and art have a great ________________(影响) on people’s ideology.

16、Look, that poor girl has been trying hard to work out a ________(解决办法) to the question.

17、U________________,the poor boy lost his life in the big fire.

18、That building is a m________________ to those who were killed in the war.

19、He succeeded in business and was very w________________.

20、The Chinese ___________________  (文明) is one of the oldest in the world.

选择题