题目内容

【题目】习惯上划分东西半球的分界线是()

A.20°W,160°EB.20°E,160°W

C.0°经线和0°纬线D.0°经线和180°经线

【答案】A

【解析】

根据东西半球分界线是20°W160°E组成的经线圈,20°W以东、160°E以西为东半球,20°W以西、160°E以东为西半球.南北半球的划分是以0°纬线即赤道为界,赤道以北为北半球,以南为南半球,进行分析解答。

任何两条相对的经线(经度之和为180°),都组成一个经线圈;任何一个经线圈,都把地球分成相等的两个半球;东经180°和西经180°,实际上重合为一条经线,即180°经线。国际上习惯用20°W160°E这两条经线组成的经线圈,作为划分东西半球的界线,因为这个经线圈基本上是从海洋通过,避免了以0°和180°经线划界,将欧洲和非洲的一些国家分隔在两个半球上。故选A

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【题目】There are four seasons in a year. We can have a lot of fun in different seasons.

Spring is a_______season and people like to fly a kite. The trees and grass begin to turn_____ . The birds sing happily in the trees. The flowers begin to come out. People like to go out for a ______to enjoy nature and get exercise.

Summer is a beautiful season. People like to wear______ clothes because it is hot. Boys wear shorts and girls wear colorful dresses or skirts. People like to have a swim and eat ice cream. In summer, days are long and nights are short. Children can stay up late at _____ because they do not have to get up early the next morning. They are on_______.

In autumn, the weather is very______. It feels so. great after the hot summer. People like to go outside for hiking. They can enjoy the beauty of nature. Besides, autumn is a season of ___. Farmers are busy with their farm work. After the harvest, they are going to prepare for the new year.

Winter is the coldest season. People often stay at home to watch TV. It often______ and everything becomes white. Children go out to make snowmen. It is also the best time to go ____. The happiest thing for children is that they have a winter holiday every year. They can get lots of red packets, eat delicious food and visit friends.

1A. rainy B. cloudy C. windy D. foggy

2A. brown B. green C. yellow D. red

3A. swim B. walk C. celebration D. talk

4A. light B. warm C. beautiful D. different

5A. noon B. night C. school D. sunrise

6A. a trip B. holiday C. duty D. show

7A. comfortable B. cold C. warm D. uncomfortable.'

8A. celebration B. planting C. harvest D. rest

9A. rains B. snows C. blows D. showers

10A. travelling B. running C. skating D. shopping

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