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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(壓力)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(發(fā)動機) 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.
小題1:By doing the “tank test”, the engineers can find out ____.
A．the amount of air in the planeB．the strength of the plane structure
C．the pressure inside and outside the planeD．the power of the airplane engines
小題2:What will happen to the plane under the “tank test”?
A．It will be brokenB．It will be made stronger.
C．It will be filled with water.D．It will be tested by pilots.
小題3:According to the text, why are test flights most dangerous?
A．The plane may explode in the airB．The pilot may lose control of the plane.
C．The engines may be damaged.D．Too much air may get into the plane.
小題4:What might be the most suitable title for the text?
A．Two Important Tests on AirplaneB．The Importance of Flying Safety
C．The Danger of Testing AirplanesD．How Airplanes Are made and Tested

小題1:B
小題2:A
小題3:B
小題4:A

小題1:本題考查考生對文中細節(jié)的理解程度�！皌ank test”的目的就是為了查找出飛機壓力，從而更好加固易損部位，以確保高空飛行時的安全性。
小題2:本題考查考生對文中細節(jié)的捕捉能力。第二段中提到“Finally, there is an explosion”,由此可見，在實驗最后飛機會爆炸。
小題3:本題考查考生對文中細節(jié)的捕捉“It is the pilot’s job to find out how he can get control of the plane again”,而如果飛行員失誤的話，則可能造成飛機失控，機毀人亡，因而test flight最危險。
小題4:本題考查考生對全文理解基礎上綜合概括能力�？v觀全文，作者講述了兩個重要的飛機測試，脈絡清晰簡明。
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