Question

Before a new type of airplane goes into service, every part of it is tested again and again. But there are two tests that are more important than all 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 (結(jié)構(gòu)) 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 pilot must find out exactly what happens when the engines (發(fā)動機(jī)) 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.

By doing the “tank test”, the engineers can find out ___________.

A. the pressure inside and outside the plane               

B. the strength of the plane structure

C. the amount of air in the plane                              

D. the power of the airplane engines

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.

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

A. The engines may be damaged.               

B. The pilot may lose control of the plane.

C. The plane may explode in the air.           

D. Too much air may get into the plane.

What might be the most suitable title for the text?

A. Two Important Tests on Airplanes                

B. The Danger of Testing Airplanes

C. The Importance of Flying Safely                  

D. How Airplanes Are Made and Tested

Answer 1

【小題1】B

【小題2】A

【小題3】B

【小題4】A

解析:

第一段是總述，介紹說明的對象：對新飛機(jī)的最重要的兩個測試。下面分成兩部分分別說明兩種測試。第一種測試介紹了其目的、步驟、結(jié)果。第二種是最危險的測試；并介紹危險在哪里。最后一句總結(jié)測試的意義。

【小題1】本題考查細(xì)節(jié)理解：第一種測試的目的。原文的：The metal structure (結(jié)構(gòu)) of the plane has to be very strong for this reason. 后文又提到如果飛機(jī)的金屬結(jié)構(gòu)承受不了空中的氣壓就會爆炸，所以B正確。

【小題2】本題同樣是考查尋讀具體信息的能力：第一種測試下飛機(jī)會出現(xiàn)的情況，也就是對文章分析部分中的第一種測試的結(jié)果。原文中的Finally, there is an explosion. 和Engineers can discover which part of the plane has broken. Then that part is made stronger.這兩句可以判斷出A正確。本題B選項的迷惑性很強(qiáng)。其錯誤的原因是題干問的是在tank test測試下的飛機(jī)會怎樣，而不是測試之后(after the “tank test”)。

【小題3】本題考查細(xì)節(jié)理解：第二種測試的危險之處。從最后一段可以看出這種測試中飛機(jī)的引擎要被關(guān)掉，而飛機(jī)駕駛員必須在下落的過程中找到能再次發(fā)動飛機(jī)的辦法，所以B正確。A錯，因為文章沒提到引擎被損壞；C錯在, 飛機(jī)在下落時有可能跌落到地上爆炸，但不會在空中爆炸，D則原文根本沒有提。

【小題4】　本題考查主旨。從文章的分析可以看出文章要講的是對飛機(jī)進(jìn)行的兩種重要測試。所以A對。B很容易誤選，因為的確危險性很大，但這并非文章的中心。C選項指安全飛行的重要性，所以也不對。D選項除了測試還說了飛機(jī)的制造所以錯.