问题 选择题

保持氢气化学性质的粒子是                             

A.H

B.H2O

C.H2

D.2H

答案

答案:C

题目分析:构成物质的微粒有分子、原子和离子,其中分子是保持由分子构成的物质化学性质的最小微粒,氢气是由氢分子构成的物质,则保持氢气化学性质的粒子是氢分子,故选C。

点评:本题主要考查了分子的性质方面的知识,解答本题的关键是要了解物质到底是由分子还是原子或者离子构成的。

翻译题

完成句子

1.政府计划在郊区建一个大的公园,居民不久就会见到它得以落实。

The government has planned to build a large park in the suburb, which the residents would like to see

                soon.

2.他们试图联系那位迷路的远足者但没能成功。

They tried to                            the lost tripper but failed.

3.线路繁忙接线人问我是否愿意等一下。

The line was engaged and the operator asked if I'd like to              .

4.你看起来很焦虑,究竟发生了什么事?

You look worried. What have you                    ?

5.一座新桥正在被建,这两个城镇将会被连接起来。

A new bridge is now being built, and the two towns will              each other.

6.我们明天要考试,如果我和你一起出去的话,老师会责备我的。

We'll have an exam tomorrow. If I                         go out with you, our teacher              me.

7.据说那个会议六点钟结束。

It's said that the meeting will                             at six o'clock.

8.我建议我们吃完家里的水果后再买。

I suggest that we              more fruits after eating up those at home.

9.我仍记得那件事,就像是在昨天才发生一样。

I still remember the whole thing               it        yesterday.

10.在我看来,电脑将会是大多数人生活中非常重要的一部分。

      , I think computers will become an important part of most people's lives.

问答题 简答题