问题 选择题

用“分子的观点”解释下列现象,不正确的是:

A.湿衣晾干是因为分子不停的运动

B.水结成冰是因为分子本身发生变化

C.气体受热膨胀是因为分子间间隔变大

D.轮胎充气是因为分子间有间隔

答案

答案:B

题目分析:B、水结冰是因为水分子间的间隔发生了变化,故B错误。选B。

阅读理解

第三部分:阅读理解(共20小题;每小题2分,满分40分)

阅读下面短文,从每题所给的四个选项(A、B、C、D)中,选出最佳选项,并在答题卡上将该项涂黑。

We used to go into different chat rooms on different websites . If you wanted to meet someone on the net , you had to go into the same chat room . But now regular net surfers chat on OICQ .

OICQ is an online chat software which is invented by Tencent Computer System Company of Shenzhen in February , 1999 . Since then it has swept the country . Its symbol is a penguin wearing a red scarf .

Net friends can be divided into a buddy list (for good friends ) , a stranger list ( for people you want to avoid on the Net ) . You can also build family lists , co-worker lists , etc .

You can know whether listed friends are online as long as you use it . The cartoon portrait(肖像,画像) of the person turns bright if he is online . And the portrait turns dim(灰暗的) if he is not there .

Traditional public chat rooms are chaotic . It is difficult to focus on a conversation . OICQ can conduct a focused talk without interruptions by other chatters . OICQ has become a regular daily communication tool . “What is your OICQ number ? ” has become a modern topic .

1. OICQ is________.

A. a special chat room for all the cyber citizens(网民)

B. a cartoon portrait to make friends on the Internet

C. an online chat software that helps you talk on the Internet more freely

D. a modern phone number used by more and more people

2. If you don’t want to chat with someone , you can put him in_______with the help of OICQ .

A. a buddy list                   B. a stranger list      

C. family lists                    D. co-worker lists

3. The passage mainly tells us____________.

A. how to chat with people on the Internet

B. how to use OICQ

C. how to choose a regular daily communication tool

D. some advantages about OICQ

单项选择题