高二英语上(Unit1.Sports event 基础知识梳理C)
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教师辅导讲义
A
Have you ever wondered?
1.Why do airplanes take longer to fly west than east?
It can take five hours to go west-east from New York (NY) to London but seven hours to
travel east-west from London to NY.The reason for the difference is an atmospheric
phenomenon known as the jet（喷射）stream. The jet stream is a very high altitude wind
which always blows from the west to the east across the Atlantic.The planes moving at a
constant air speed thus go faster in the west-east direction when they are moving with the
wind than in the opposite direction.
2.What would happen if the gravity on Earth was suddenly turned off?
Supposing we could magically turn off gravity. Would buildings and other structures（建
筑物）float away? What happened would depend on how strongly the things were attached
to the Earth. The Earth is moving at quite a speed, moving at over a thousand miles per hour.
If you turn something around your head on a string（细绳）,it goes around in a circle until
you let go of the string. Then it flies off in a straight line. ‘Switching off’ gravity would be
like letting go of the string. Things not attached to the Earth would fly off in a straight line.
People in buildings would suddenly shoot upwards at a great speed until they hit the ceiling.
Most things outside would fly off into space.
60.What information can we get from the first passage?
A. It is the jet stream that affects how fast airplanes fly.
B. Planes go slower when they are moving with the wind.
C. It takes more time to fly from NY to London than from London to NY.
D. The jet stream always blows from the east to the west across the Atlantic.
61.The word “shoot” underlined in the 2nd passage probably means “__________”.
A. send for
B. move quickly
C. come out
D. grow quickly
62.It can be inferred that without gravity _____________.
A. buildings and other structures would float away
B. trees and buildings would not so easily fly off
C. something around your head would not float away
D. everything outside buildings would fly off into space
63.Where can we most probably read this text?
A. In a research paper.
B. In a short story.
C. In a travel magazine.
D. In a student’s book
*****************************************************************************************************重点解析：
【文章大意】为什么飞机由西向东飞所花费的时间要短一些？如果地心引力突然消失会出现什么情
况？本文对这两个问题做了探讨。
60.答案A
【解析】细节理解题。由文中第一段前两句可知A选项正确。本题也可以用排除法解题。根据常识顺风时当然速度更快，判断B选项错误；根据第一句可以判断C选项错误；由第一段第三句“…which always blows from the west to the east across the Atlantic”可知D选项错误。
61.答案B