名著阅读。 《________》是我国著名翻译家、文艺评论家傅雷写给孩子的家信

甲癣和足癣的病原体是[ ]

A．细菌    

B．病毒    

C．噬菌体    

D．致病真菌

          you read it , you can' t imagine how moving the story is .

A. Unless         B. Because          C. Although

用所给词的适当形式填空。

1. What do you think is the most______(help)invention?

2. Edison was a great            (invent). He had many______(invent) during his lifetime.

3. What______electric slippers            (use)for?

4. Personal computers              (invent) in 1976.

5. —What is the knife used for?

    —It's used for               (cut) things.

我国幅员辽阔，人口众多，各地区由于受气候、物产、人口、（）、经济等多方面因素的影响，在饮食口味上形成了各自不同的特点。

110kV交联聚乙烯电缆的外电极是在外护套的外面（）

A.挤出聚乙烯或聚氯乙烯

B.缠绕铜丝

C.涂覆石墨涂层或挤出半导电层