Before a new type airplane goes service, every part of it is

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/04/27 19:22:58

Before a new type airplane goes service, every part of it is tested again and again. But there are two tests that are more of into important than the others.
The first is called the “tank test”. A modern airplane must fly very high in the sky. Air must be pumped into the plane so that the passengers can breathe. The metal structure of the plane has to be very strong for this reason. When the plane is filled with air, the air presses against the skin of the plane inside. The pressure(压力)on a small window is like a huge foot that is trying to get out. If a small part of the plane were to fail, the plane would explode in the sky. To test the structure of the plane, the plane is lowered into a huge tank or container of water. Then it is filled with air. The pressure inside the plane is greater than it ever will be when it is high up in the air. Finally, there is an explosion. This does not cause so much damage inside the water tank as it would anywhere else. Engineers can discover which part of the plane has broken. Then that part is made stronger.
The most dangerous test happens when the new plane is going through test flights in the air. The test must find out exactly what happens when the engines(发动机) are all shut off at once. The plane begins to fall like a stone. It is the pilot’s job to find out how he can get control of the plane again. These two tests are examples of how planes are made safe before they ever carry passengers.
小题1:By doing the “tank test”, the engineers can find out ____.

A．the amount of air in the plane	B．the strength of the plane structure
C．the pressure inside and outside the plane	D．the power of the airplane engines

小题2:What will happen to the plane under the “tank test”?

A．It will be broken	B．It will be made stronger.
C．It will be filled with water.	D．It will be tested by pilots.

小题3:According to the text, why are test flights most dangerous?

A．The plane may explode in the air	B．The pilot may lose control of the plane.
C．The engines may be damaged.	D．Too much air may get into the plane.

小题4:What might be the most suitable title for the text?

A．Two Important Tests on Airplane	B．The Importance of Flying Safety
C．The Danger of Testing Airplanes	D．How Airplanes Are made and Tested

小题1:B
小题2:A
小题3:B
小题4:A

小题1:本题考查考生对文中细节的理解程度。“tank test”的目的就是为了查找出飞机压力，从而更好加固易损部位，以确保高空飞行时的安全性。
小题2:本题考查考生对文中细节的捕捉能力。第二段中提到“Finally, there is an explosion”,由此可见，在实验最后飞机会爆炸。
小题3:本题考查考生对文中细节的捕捉“It is the pilot’s job to find out how he can get control of the plane again”,而如果飞行员失误的话，则可能造成飞机失控，机毁人亡，因而test flight最危险。
小题4:本题考查考生对全文理解基础上综合概括能力。纵观全文，作者讲述了两个重要的飞机测试，脉络清晰简明。

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