
导体在电流通过时所发生的阻力作用,称为导体的()。
A.电阻;
B.电导;
C.电导率;
D.电阻率。


A.电阻;
B.电导;
C.电导率;
D.电阻率。
READING COMPREHENSION [35 MIN]
SECTION A MULTIPLE-CHOICE QUESTIONS
In this section there are several passages followed by ten multiple-choice questions. For each question, there are four suggested answers marked A, B, C and D. Choose the one that you think is the best answer and mark your answers.
Passage One
The final dying sounds of their dress rehearsal left the Laurel Players with nothing to do but stand there, silent and helpless, blinking out over the footlights of an empty auditorium. They hardly dared to breathe as the short, solemn figure of their director emerged from the naked seats to join them on stage, as he pulled a stepladder raspingly from the wings and climbed halfway up its rungs to turn and talk to them, with several clearings of his throat.
"It hasn't been an easy job," he said, his glasses glinting soberly around the stage. "We've had a lot of problems here, and quite frankly I'd more or less resigned myself not to expect too much. Well, listen. Maybe this sounds corny, but something happened here tonight. Sitting out there tonight I suddenly knew, deep down, that you were all putting your hearts into your work for the first time." He let the fingers of one hand splay out across the pocket of his shirt to show what a simple, physical thing the heart was; then he made the same hand into a fist, which he shook slowly and wordlessly in a long dramatic pause, closing one eye and allowing his moist lower lip to curl out in a grimace of triumph and pride. "Do that again tomorrow night, " he said, "and we'll have one hell of a show."
They could have wept with relief. Instead, trembling, they cheered and laughed and shook hands and kissed one another, and they all sang around the auditorium piano until the time came to agree, unanimously, that they'd better knock it off and get a good night's sleep.
And riding home under the moon, they found they could roll down the windows of their cars and let the air in, with its health-giving smells of loam and young flowers. It was the first time many of the Laurel Players had allowed themselves to acknowledge the coming of spring.
The trouble was that from the beginning they had been afraid they would end by making fools of themselves, and they had compounded that fear by being afraid to admit it. At first their rehearsals had been held on Saturdays — always, it seemed, on the kind of windless February or March afternoon when the sky is white, the trees are black, and the brown fields and hummocks of the earth lie naked and tender between curds of shriveled snow. The Players, coming out of their various kitchen doors and hesitating for a minute to button their coats or pull on their gloves, would see a landscape in which only a few old, weathered houses seemed to belong; it made their own homes look as weightless and impermanent, as foolishly misplaced as a great many bright new toys that had been left outdoors overnight and rained on.
1. The atmosphere in the first paragraph is primarily .
A. suspenseful
B. relaxing
C. mysterious
D. lively
2. What does "naked" in the first paragraph mean?
A. venerable
B. unclothed
C. unoccupied
D. undisguised
3. What does the last paragraph serve to the whole passage?
A. Provide information about how the theater company was formed.
B. Deliver insight into the character of the director.
C. Digress to a commentary about human nature.
D. Describe what happened preceding the dress rehearsal.
Passage Two
People have been painting pictures for at least 30 , 000 years. The earliest pictures were painted by people who hunted animals. They used to paint pictures of the animals they wanted to catch and kill. Pictures of this kind have been found on the walls of caves in France and Spain. No one knows why they were painted there. Perhaps the painters thought that their pictures would help them to catch these animals. Or perhaps human beings have always wanted to tell stories in pictures.
About 5 , 000 years ago, the Egyptians and other people in the Near East began to use pictures as a kind of writing. They drew simple pictures or signs to represent things and ideas, and also to represent the sounds of their language. The signs these people used became a kind of alphabet. The Egyptians used to record information and to tell stories by putting picture writing and pictures together. When an important person died, scenes and stories from his life were painted and carved on the walls of the place where he was buried. Some of these pictures are like modern comic strip stories. It has been said that Egypt is the home of the comic strip. But, for the Egyptians, pictures still had magic power. So they did not try to make their way of writing simple. The ordinary people could not understand it.
By the year 1, 000 BC, people who lived in the area around the Mediterranean Sea had developed a simpler system of writing. The signs they used were very easy to write, and there were fewer of them than in the Egyptian system. This was because each sign, or letter, represented only one sound in their language. The Greeks developed this system and formed the letters of the Greek alphabet. The Romans copied the idea, and the Roman alphabet is now used all over the world.
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