如图所示的实验，是我们在学习分子动理论时做过的一些实验：

图a：浓硫酸铜溶液与清水开始界面十分清晰，几天之后，两种液体混合均匀了；

图b：玻璃板的下表面接触水面，发现拉力大于玻璃板的重力；

图c：水和酒精充分混合后的总体积小于混合前水和酒精的总体积；

图d：将红墨水滴入水中，可以看到它在水中扩散开来；

图e：将两个底面干净、平整的铅块紧压在一起，两个铅块就会结合在一起，下面吊一个较重的物体也不会将它们拉开．

根据句子意思，写出下列句子括号内所给单词的正确形式。
The children often get ____ (noise) in the classroom after class .
Sometimes he spends his weekend____ (fish).
Several____ (foreign)came to visit our school last week.
I think the red skirt looks as ____ (good)as the green one .
John just got his____ (driver) license.
Look!Mrs Li is there. Let's go and say hello to____ (she)?
My mother often____ (enjoy) the TV plays in the evening.
Talking loudly in a library is very____ (polite).
B.根据句子意思及所给的首字母或汉语提示，写出该句子中所缺的单词。
Li Na is a famous tennis p____ .
We can’t l____ to music when the teacher is talking in class.
The children had a____  been asleep when I got home .
Mr Li is s____ with his students and makes them work hard.
Zhou Gu was____ （采访）by the local  newspaper.
There are ____ (五十二)weeks in a year.
The doctor gave him some medicine for his serious____ (疾病)。

自秦始皇建立君主专制制度后，历代王朝一方面设置宰相作为皇帝的助手参与国家大事的决策，另一方面又想方设法削弱宰相的权力。与之有关的措施有
①西汉设置“中朝”②唐朝实行三省制③明朝设立内阁④清朝设立军机处

下列属于生物的是（    ）