《西厢记》《桃花扇》的作者分别是谁？是哪个朝代的？

阅读下面短文，用括号内所给动词的适当形式填空。（必要时可加助动词或情态动词）

     To welcome the Olympics in 2008 in Beijing, many old people begin to learn English now.

     Grandma Han Ye is 75 years old. She 1._____ (read) English sentences aloud every day. Now she 2._____

(learn) about 30 phrases.

     Han is too old to go to school. Her teachers are some Junior 2 students from Zhongshan Middle School in

Shanghai. They began helping the old people study English, one-to-one, in May. The old people 3._____ (hope)

to use English during the Olympics in 2008.

     Han has never learned English before, so she has to begin with ABC. And she often 4._____ (forget) what

she had learnt. So her little teacher, Lingling, has to say a word five or six times and also tells her how

 5. _____ (use) it. Grandma works hard and now she 6._____ (talk) with her grandson at primary school in

English.

      Many old people take the English notes with them while they 7._____ (do) the housework. They read the

notes again the again in order to make the sentences correctly. Next month, Han and some old people 8._____

(fly)to Beijing to spend their holidays and to practise their spoken English.

     Grandma's spirit(精神) makes us work harder and harder for our country.

与草履虫的基本结构相似的是（）

A.流感病毒

B.番茄果肉细胞

C.酵母菌

D.人的口腔上皮细胞

根据《中华人民共和国水污染防治实施细则》的规定，生活饮用水水源保护区共分为( )保护区。

A．两级
B．三级
C．四级
D．五级

井下排水设备主要有哪些？