Question

六、阅读理解(20分)

              (A)

    Men have always wanted to fly like birds. Birds can fly easily because they are light,but men's bodies are heavier.

    Men first went up into the air in balloons. These are big bags,and they are filled with gas. Hydrogen (氢气) is a useful gas for galloons. It is lighter than air. Helium is also lighter than air,but it costs a lot of money. So balloons are usually filled with hydrogen.

    Balloons have to fly with the wind as they have no engines (引擎) to drive them. Later,men made airships. These were balloons with engines. They were also filled with hydrogen.

    Aircraft with wings now take people across the world. Powerful engine^s drive these machines across the sky. Some of the engines are like the engines of cars,but they are more powerful.

    There is another kind of engine which we call the jet engine. An English engineer invented the jet engine. In May 1941 his new engine was fixed in an aircraft,and the aircraft flew quite well. At the same time,the Germans were also building a jet engine,but neither country told the other,of course.

   Jet engines are very powerful. Usually two,three or four are enough for an airplane;but some big aircraft have six. Anyone in a moving jet plane can feel the power of the engines. Jet planes can travel faster than sound. As a flying jet plane leaves its noise behind it,we do not hear it until it has gone.

() 1. Men can't fly like birds because

   A. men don't have aircraft   B. men's bodies are too heavy

   C. men don't like birds   D. men can't drive the jet plane

() 2. The underlined sentence “ Hydrogen is a useful gas for balloons” means .

   A. hydrogen is good for balloons to fly

   B. balloons have to use hydrogen to fly

   C. balloons can't fly without hydrogen

   D. hydrogen is very cheap for balloons

() 3. Which of the following is not true according to the passage?

   A. Men flew up into the air in balloons firstly.

   B. A jet engine was invented by an English engineer.

   C. Some of the engines are more powerful.

   D. The English told the Germans they built a jet engine.

() 4. We don't hear the flying jet plane's noise until it has gone because .

   A. jet engines are very powerful

   B. jet planes have enough jet engines

   C. no one can feel the power of the engines

   D. jet planevS travel faster than sound

() 5. The main idea of the passage is about .

   A. the planes   B. the balloons   C. the flying   D. the jet planes

Answer 1

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