Before a new airliner 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. One of them is very strange and the other is very dangerous. The first of these is called the “tank test”. A modern airliner must fly at very high altitudes. Air must be pumped into the place 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, or “pressured”, the air presses against the skin of the plane inside. The pressure on a small window, for example, is like a huge foot that is trying to get out. If a small part of the plane were to crack, the plane would explode in the sky. This is what happened to the first Comets. In order to test the structure of the plane, it is lowered into a huge tank of water. Then it is filled with air. The pressure inside the plane is greater than it ever will be when it is inthe air. Finally, there is an explosion. Engineers can discover which part of the plane has cracked. This part is made stronger. The most dangerous test happens when the new plane is going through test flight in the air. The test pilot must find exactly what happens whenall the engines are shut off at once. He takes the plane up very high. Then he shuts the engines off,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. The passage implies that modern airlines are ()
A. reliable
B. dangerous
C. complicated
D. efficient
Before a new airliner 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. One of them is very strange and the other is very dangerous. The first of these is called the “tank test”. A modern airliner must fly at very high altitudes. Air must be pumped into the place 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, or “pressured”, the air presses against the skin of the plane inside. The pressure on a small window, for example, is like a huge foot that is trying to get out. If a small part of the plane were to crack, the plane would explode in the sky. This is what happened to the first Comets. In order to test the structure of the plane, it is lowered into a huge tank of water. Then it is filled with air. The pressure inside the plane is greater than it ever will be when it is inthe air. Finally, there is an explosion. Engineers can discover which part of the plane has cracked. This part is made stronger. The most dangerous test happens when the new plane is going through test flight in the air. The test pilot must find exactly what happens whenall the engines are shut off at once. He takes the plane up very high. Then he shuts the engines off,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. A test flight is dangerous because the test pilot has to().
A. fly his plane at a very high altitude
B. secure a safe landing in a plane crash
C. find out how to handle a plane when its engines stop working
D. fix the damaged engines during the flight
Have you ever seen a movie in which a building was burned down or a bridge was destroyed Have you seen films in which a train crashed or a ship sank into the ocean If so, you may have wondered how these things could happen without harming the people in the film. The man who knows the answer is the “special-effects” man. He has one of the most important jobs in the film industry. He may be ordered to create a flood or to make a battlefield explode. But he may also be asked to create a special effect which is much less exciting, though just as important to the success of the film. In a scene for one movie, there was a big glass bowl filled water in which small fish were swimming. The director of the movie wanted the fish to stop swimming suddenly while they seemed to stare at an actor. Then the director wanted the fish to stop staring and swim away. But fish cannot be ordered to do anything. It was quite a problem. The special-effects man thought about this problem for a long time. The result was an idea for controlling the fish with a harmless use of electricity. First, he applied electricity to the fish bowl, causing the fish to be absolutely still. Then he rapidly reduced the amount of electricity, allowing the fish to swim away. Thus, he got the humorous effect that the director wanted. As in other parts of movie making, there are those who have developed particular skill in creating certain kinds of effects. For fires, the special-effects man does not trust the normal burning process of wood or other materials. He does not have time to wait until large flames appear. Usually he places metal pipes in the area that is to be burned. Gas flowing through the pipes burns instantly but can be kept under control easily by opening or closing the pipes. All this requires training, skill, and experience. It also adds a great deal to the expense of producing the film. It helps explain why so many movies are very expensive to make. The special-effects man used electricity tocontrol the fish in a bowl because().
A. the fish cannot swim and stop freely
B. the fish cannot stare at the actor
C. the fish cannot stay still
D. the fish cannot be ordered to do anything
Directions: In this part you are required to write a composition entitledWhere to Seek Employment----In a Big City or In a Small City in no less than 100 words according to the following Chinese outline.Please remember to write it on the Answer Sheet. 1. 有些人喜欢在大城市找工作,因为这可以带来很多好处。2. 但有些人喜欢在小城市工作。3. 我认为……