Where can we most probably read in the text A.In a reseach paper B.In a short story C.In a travel——青夏教育精英家教网—

摘要：Where can we most probably read in the text A.In a reseach paper B.In a short story C.In a travel magazine D.In a student’s book 答案:60-63 ABBD Passage 2 The need to feed a growing population is putting much pressure on the word’s supply of water.With 97% of the word’s water too salty to be drunk or used in agriculture,the wordwide supply of water needs carefull management.especially in agriculture .Although the idea of a water shortage seems strange to someone fortunate enough to live in a high rainfall country,many of the word’s agriculture industries experience constant water shortages. Although dams can be built to store water for agriculture use in dry areas and dry seasons,the costs of water redistribution are very high.Not only is there the cost of the engineering itself,but there is also an envitonmental cost to be considered.Where valleys are flooded to create dams,houses are lost and wildlife homes destroyed.Besides,water may flow easily through pipes to fields,but it cannot be transported from one side of the world to the other.Each country must therefore rely on the management of its own water to suply its farming requirements. This is particularly troubling for countries with agricultural industries in areas dependent on irrigation.In Texas,farmers’ overuse of irrigation water has resulted in a 25% reduction of the water stores.In the Central Vally area of southwestern USA,a huge water engineering project provided water for farming in dry valleys,but much of the water use has been poorly managed.

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(10·安徽B篇)

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 bur 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 hours. 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 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 yet stream always blows from the east to the west across the Atlantic

61.The word”shoot”underline in the 2^nd passage probably means “ ”

A.send for B.move quickly C.come out D.grrow quickly

62.It can be inferred that without gravity .

A.buildings and other structures would float away

B.trees and buildings would not easily fly off

C.something around your head would not fly away

D.everything outside buildings would fly off into space

63.Where can we most probably read in the text

A.In a reseach paper B.In a short story

C.In a travel magazine D.In a student’s book

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