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阅读下面短文，判断句子的正(T)误(F)。
X-rays were first discovered by a German scientist, Wilhelm Konrad Rontgen, in 1895, almost by accident． He and several other scientists were experimenting with passing electric currents through certain gases in a special glass tube from which the air had been moved． One day Rontgen noticed that, even when the tube was covered with black paper, some strange kind of radiation was coming through and making a screen nearby glow． Rontgen could not see anything coming out of the tube, but then he discovered that if he put the screen in the next room on the other side of a closed door, the rays could pass not only through black paper but also through wood．
The next thing he found out was that if he put his hand between the rays and a photographic plate , the rays would print a shadow of the bony framework of his hand on the plate． In fact , the rays could pass as easily through the fleshy part of his hand as through the black paper, but hardly at all through the bone． So Rontgen made the first X-ray picture of a hand, showing just how the bones in the hand fit together．
1．What puzzled Rontgen one day during his experiment was the．black-paper-covered tube．
2．The screen didn't stop glowing even when it was moved to the next room．
3．Rontgen put his hand between the rays and a photographic plate to stop the radiation．
4．The rays proved to be unable to pass through wood．
5．From the passage , we know X-rays are invisible．
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阅读理解。
阅读下面短文，从每题所给四个选项中选出最佳答案。
X-rays were first discovered by a German scientist, Wulhelm Konrad Rontgen, in 185, almost by chance.
While he was experimenting with electric current through certain gases in a special glass tube, Rontgen happened to notice that, even when the tube was covered with black paper, some strange kind of radiation was coming through and making a screen nearby glow. Then he put the screen in the next room of a closed door. The screen was still glowing. The screen showed that the strange rays could not only pass through black paper but also wood.
Rontgen next put his hand between these unseen rays and a photographic plate, the rays would print a shadow of the bony framework of his hand on the plate.
In this way, Rontgen discovered such rays and made the first X-ray picture of a hand, showing just how the bones in the hand fit together. In his account of what he had discovered, Rontgen named these new rays X-rays, which was called by other scientists Rontgen rays.
1．The sentence “Rontgen discovered X-rays almost by chance” means ________.
[ ]
A．he was given a chance to discover them
B．he discovered X-rays unexpectedly
C．he devoted his life to the discovery of X-rays
D．he invented X-rays all by himself
2．Radiation is a kind of energy in the form of ________.
[ ]
3．Rontgen was the first man who ________.
[ ]
A．invented X-rays
B．printed a picture of the hand
C．used photographic plate
D．discovered X-rays and made used of it
4．What do you suppose Rontgen was according to the passage?
[ ]
A．He was an X-rays picture maker.
B．He was a chemist.
C．He was a physicist.
D．He was a doctor.
5．Which is the best title for this passage?
[ ]
A．The Discovery of X-rays.
B．The Use of X-rays.
C．Rontgen, the Great Scientist.
D．Discovery by Chance.
查看习题详情和答案>>Elizabeth Clay decided to go home and spend the holiday with her parents. The next day she drove her old car home along the road. 36 she found she got a flat tire（轮胎）. The 22-year-old student 37 to stop her car by the side of the road in the winter night and opened the trunk. No spare tire.
At this time, a car 38 . Paul and Diane told Clay to 39 them to a service station near their 40 . They arrived to see that it had no suitable tires to 41 with her car. “Follow us home,” said Paul.
The couple called around to find a tire. No 42 . They decided to let her use their own car. “Here,” Paul said, handing Clay a set of keys, “Take our car. We won’t be using it over the holiday.”
Clay was 43 . “But I’m going all the way to South Carolina, and I’ll be gone for two weeks.” she 44 them.
“We know,” Paul said. “We’ll be 45 when you get back. Here’s our number if you need to 46 us.”
Unable to believe her eyes, Clay watched as the 47 put her luggage into their car and then sent her off. Two weeks later she 48 to find her old car cleaned inside and out with three new tires and the radio 49 .
“Thank you so much,” she said. “How much do I owe you?” “Oh, no,” Paul said, “we don’t want any money. It’s our 50 .” Clay realized that while it might have been their pleasure, it was now her duty to pass on their “do unto others” spirit.
A．Suddenly B．Finally C．Immediately D．Fortunately
A．liked B．wanted C．allowed D．managed
A．passed B．stopped C．went D．started
A．help B．push C．take D．follow
A．garage B．house C．shop D．hotel
A．agree B．come C．go D．deal
A．problem B．message C．success D．luck
A．interested B．worried C．suprised D．sad
A．persuaded B．advised C．reminded D．promised
A．happy B．here C．away D．busy
A．get in touch with B．keep in touch with
C．be in touch with D．put in touch with
A．repairmen B．cleaners C．friends D．couple
A．shocked B．happened C．returned D．came
A．done B．repaired C．tied D．rebuilt
A．wish B．job C．duty D．pleasure
查看习题详情和答案>>The famous director of a big and expensive movie planned to film a beautiful sunset over the ocean, so that the audiences could see his hero and heroine in front of it at the end of the film as they said goodbye to each for ever. He sent his camera crew (摄影组) out one evening to film the sunset for him.
The next morning he said to the men, “Have you provided me with that sunset?”
“No, sir,” the men answered.
The director was angry, “Why not?” he asked.
“Well, sir,” one of the men answered, “we are on the east coast here, and the sun sets in the west. We can get you a sunrise over the sea, if necessary, but not a sunset.”
“But I want a sunset!” the director shouted. “Go to the airport, take the next flight to the west coast, and get one.”
But then a young secretary had an idea. “Why don’t you photograph a sunrise?” she suggested, “and then play it backwards? Then it’ll look like a sunset.”
“That’s a good idea!” the director said. Then he turned to the camera crew and said, “Tomorrow morning I want you to get me a beautiful sunrise over the sea.”
The camera crew were out early the next morning and filmed a bright sunrise over the beach in the middle of a beautiful bay(海湾)。 Then at nine o’clock they took it to the director. “Her it is, sir.” They said, and gave it to him. He was very pleased.
They all went into the studio. “ All right,” the director explained, “ now our hero and heroine are going to say goodbye. Run the film backwards so that we can see the ‘sunset’ behind them.”
The “sunset” began, but after a quarter of minute, the director suddenly put his face in the hands and shouted to the camera crew to stop.
The birds in the film were flying backwards, and the waves on the sea were going away from the beach.
One evening, the director sent his camera crew out ______________.
A. to watch a beautiful sunset B. to find an actor and an actress
C. to film a scene on the sea D. to meet the audience
Which of the following is not true?
A. The crew had to follow the secretary’s advice.
B. If you want to see a sunrise. The east coast is the place to go to.
C.The camera crew wasn’t able to film the scene the first day.
D.The director ordered his crew to stop filming the “sunset”.
The director wanted to film a sunset over the ocean because___________.
A it went well with the separation of the hero and heroine
B when they arrived at the beach it was already in the evening
C it was more moving than a sunrise
D the ocean looked more beautiful at sunset
After the “sunset” began, the director suddenly put his face in his hands __________.
because he was moved to tears
as he saw everything in the film moving backwards
as the sunrise did not look as beautiful as he had imagined
because he was disappointed with the performance of the hero and heroine.
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