问题 单项选择题

冷锋和暖锋的共同点有()①暖空气均在锋面以下②锋面均向暖气团一侧移动③过境后天气均转好④过境时均可能伴有云、雨

A、③④

B、①②

C、①④

D、②③

答案

参考答案:A

解析:

由于暖气团的密度小于冷气团,故暖气团适中位于锋面之上,①错误;按照锋面两侧气团势力的强弱,若冷气团势力强,则冷气团推动暖气团向暖气团一侧移动,为冷锋;若暖气团势力强,则暖气团推动冷气团向冷气团一侧移动,为暖锋,故②错误;冷锋、暖锋过境之后,都将受单一气团控制,故天气转好,③正确;由于锋面附近,气温、气压和湿度等差异很大,故锋面附近常伴有云、雨、大风等天气,故锋面过境时常伴有云、雨天气,④正确。

点评:本题难度低,学生只要掌握锋面两侧的气团分布特征,锋面附近的天气和锋面的移动规律等基础内容即可判断,对于此类基础性试题,学生应加强对课本知识的落实。

阅读理解

阅读理解。

     Modern life is impossible without traveling. The fastest way of traveling is by plane. With a modern airline

you can travel in one day to places which it took a month or more to get to a hundred years ago.

     Traveling by train is slower than plane, but it has its advantages (优势). You can see the country you are

traveling through. Modern trains have comfortable seats and dining-cars. They make even the longest journey

enjoyable.

     Some people prefer to travel by sea when possible. There are large liners and river boats. You can visit

many other countries and different places. And traveling by sea is a very pleasant way to spend a holiday.

     Many people like to travel by car. You can make your own timetable. You can travel tree or four hundred

miles or only fifty or one hundred miles a day, just as you like. You can stop wherever you wish-where there

is something to see, at a good restaurant where you can enjoy a good meal, or at a hotel to spend the night.

That is why traveling by car is popular for pleasant trips, while people usually take a train or plane when they

are traveling on business.

1. If you want to go to a faraway place in the shortest time, you'd better travel ______.

A. by train

B. by sea

C. by plane

D. by car

2. If you want to travel more freely, the best way is ______.

 A. by train

B. by sea

C. by plane

D. by car

3. The passage tells us that all the ways of traveling are enjoyable except traveling _______.

A. by train

B. by sea

C. by plane

D. by car

4. The reason why businessmen usually take a train or plane is probably to _______.

A. save time

B. enjoy themselves

C. visit more places

D. travel farther

5. From the passage we can see that _______.

A. all the ways of traveling today are much faster than those a hundred years ago

B. Each way of traveling that is mentioned has its own advantage

C. different people like different ways of traveling

D. more and more new ways of traveling will be invented

选择题