Have you ever wondered?1.Why do airplanes

题目内容：

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 know 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 movement a constams air speed thus go faster in the west-east direction when the air 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 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 round your head on a string, it goes around in a circle until you let go of the strong go of the string. Things not attacked 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 would fly off into space.

1.What information coa we get from the first passage?

A.tis the iet stoomn that affeets 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 Atantic.

2.The word“shoot”underlined in the 2nd passage probably means“__________”.

A.send for

B.move quickly

C.come out

D.grow quickly

3.It can be interred 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

4.Where can wemost probably read this text?

A.In s research paper

B.In a tort story.

C.In a travel magazine.

D.In a student’s book.

最佳答案：

小题1:A

小题2:B

小题3:B

小题4:D

答案解析：

略

考点核心：

人物传记类文章的文体特征：

人物传记是记叙文体的一种，主要描写某人的生平事迹、趣闻轶事、生活背景、个性特征、成长奋斗历程等，包含记叙文的时间、地点、人物、事件等要素。其特点是以时间的先后或事件的发展为主线，空间或逻辑线索贯穿文章始终，脉络清楚，可读性较强。