B．

H．ave 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.

60.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.

[主观题]H．ave you ever been to the place? You can see many places of interest there．（合并为一句）H．ave you ever been to the place ________you can see many places of interest?

[主观题]H．ave you ever been employed?

[单选题]B．News 1H．ave you ever thought of being able to fly round the world in a few hours though it is about 40，000 kilometres? One day， maybe you can． Last Saturday， the American X-43A airplane made its first flight． It reached a speed of 8，000 kilometres

[主观题]H．ave you ever been part of a workgroup and attained the group goal through the joint efforts? What role did you play in the whole process? (No more than 1000 letters)

[试题]H．ave you ever served the auxiliary engine to combustion heavy oil? What should be borne in mind when transferring oil; from heavy oil to light oil?

[主观题]Why do you think you were successful in your last job?你为什么认为自己在前一份工作中做得很成功？

[单选题]Why did you dothat?Have you gone [insane]?A.deafB.blindC.crazyD.ill

[单选题]D．H．ave you ever noticed the colour of the water in a river or stream after a heavy rainfall? What do you think caused this change in colour? It is soil that has been washed into the river from the riverbank or from t}le nearby fields.C．omponents of

[单选题]Passage FourH．ave you ever heard of a flower whose seeds are carried and spread by elephants? The rafflesia, a rare blossom, is very unusual. Found in the rain forests of Sumatra, the rafflesia is the world's largest flower, measuring three feet in

[单选题]H．ave you ever seen the man in the moon?If you look (11)______ at the moon on some nights. you can see the face of the man in the moon. Some people say that they can see an old man (12) ______ sticks. Others say a girl reading. These pictures are mad