题目内容

【题目】两条相对的经线组成一个经线圈,可把地球分为两个半球。请据所学知识,回答下列各题

【1】下列不属于相对的经线一组是

A.20°W和160°E B.90°W和90°E

C.0°和180°经线 D.45°W和45°E

【2】上题四组经线圈中,是东西半球分界线的是

A.20°W和160°E B.90°W和90°E

C.0°和180°经线 D.45°W和45°E

【答案】

【1】D

【2】A

【解析】

试题分析:

【1】经线的形状是半圆,每条经线与它相对的经线组成一个经线圈,其度数和为180°,东西经度相反(0°经线和180°经线相反);

【2】地球仪上任何两条相对的经线(之和180°)组成的经线圈都可将地球分成相等的两个半球,而国际上习惯用20°W和160°E两条经线组成的经线圈作为东西半球的分界线,是避免了用0°和180°经线组成的经线圈将欧洲和非洲的一些国家给分隔到两个半球上,故选A.

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【题目】阅读下面短文, 从短文所给各题的四个选项(A、B、C和D)中, 选出可以填入空白处的最佳选项。
Peter came from a poor family. His father died when he was six. His mother had no money to send him to school. His mother's best friend, Mrs. Smith, felt that the boy was 1 , and decided to give him some money so he 2 go to school. When the boy finished high school, he found a job in the city.
3soon Mrs. Smith had a serious illness. As she was dying, she asked Peter to take care of her daughter. A few years later, Peter married the girl. He loved her so much that he tried to make her 4 every day. He cooked lots of delicious food and bought all kinds of beautiful clothes for her. So she became very fat and found it 5to walk.
One day, she felt uncomfortable. She went to the hospital. The doctor 6 and told her not to eat meat, sugar, chocolate and things like that. She was afraid she might 7 the doctor's words, so she wrote all the names of the foods on a piece of paper. When she got home, she put the 8 on the table and went out. When she returned home, she found all kinds of meat, sugar, chocolate in the kitchen. Peter was busy 9 . As soon as he saw her, he said 10"I've bought all the foods you wanted, dear!"
(1)A.lazy B.clever C.funny D.boring
(2)A.would B.must C.had to D.could
(3)A.Though B.So C.But D.Or
(4)A.outgoing B.lovely C.active D.happy
(5)A.hard B.easy C.happy D.comfortable
(6)A.looked her up B.looked her over C.looked for her D.looked at her
(7)A.forget B.catch C.remember D.follow
(8)A.notice B.name C.words D.list
(9)A.eating B.drinking C.cooking D.having
(10)A.sadly B.excitedly C.angrily D.politely

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