Question

2．1．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 shootupwards 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
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 2^nd passage probably means"B"．
A．send for                                         
B．move quickly
C．come out                                        
D．grow quickly
62．It can be inferred that without gravityB．
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？D
A．In a research paper．
B．In a short story．
C．In a travel magazine．
D．In a student's book．

Answer 1

分析 本文是科普说明文，主要介绍了飞机为什么向西面飞比向东面飞花的时间更长的原因是气流的方向．从纽约飞往伦敦要花5个小时，而从伦敦飞往纽约则要花7小时．花费时间不同的原因大气现象，喷射气流是一个高空风，这种喷射气流总是穿过太平洋上空从西往东吹．还介绍了没有了地球引力会发生什么．地球以一种极快的速度移动，一个小时会移动超过1000英里，地球引力消失就会像松开甩动的细绳一样，在建筑里的人们将会突然以一种极快的速度被发射出去，直到撞到天花板．许多外面的东西都将飞进太空．

解答 60．A  归纳总结题．根据短文第一段"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"主要讲述了飞机为什么向西面飞比向东面飞花的时间更长的原因是气流的方向，故选A．
61．B  词意猜测题．根据第二段"People in buildings would suddenly shootupwards at a great speed until they hit the ceiling （="top"surface of a room）．Most things outside would fly off into space．"描述在建筑里的人会突然以一个巨大的速度向上移动直到他们撞上天花板．很多东西会飞到外太空．故选B．
62．B   推理判断题．根据第三段"What happened would depend on （依靠） how strongly the things were attached （吸附） to the earth．"描述发生了什么将取决于东西连接到地球上有多结实．再根据后面描述"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"可知，树以及建筑不像其他物品那样容易飞出．故选B．
63．D   文章出处．根据四个选项，A项，研究论文，B项小故事，C项旅游杂志，D项学生课本，这是一篇科普短文，有可能来自学生课本，故选D．

点评 解答细节理解题时，一个常用的方法就是运用定位法，即根据题干和选项中的关键词从原文中找到相关的句子，与选项进行比较从而确定答案；推理判断题既要求学生透过文章表面文字信息推测文章隐含意思，又要求学生对作者的态度、意图及文章细节的发展作正确的推理判断，力求从作者的角度去考虑，不要固守自己的看法或观点．