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问题 选择题
大千世界，有许多奥秘等待发现．下列说法中错误的是（　　）

A．水是由水分子构成

B．卢瑟福提出原子的核式模型

C．宇宙正处于不断的膨胀中

D．纳米技术与我们生活相去甚远

答案

答案：D

单项选择题

______ is a sequence of letters and digits, the first character must be a letter.

A．An identifier

B．A string

C．An array

D．program
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填空题

用所给单词的适当形式填空。

1. They said he was a _____(real) good pupil.

2. I don't need your help.I can do it _____(me).

3. Father hasn't come back yet. Mother is _____(worry) about him.

4. I prefer _____(read) books to watching 'rv.

5. A _____( swim) pool is somewhere you can swim.
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