完形填空。 | ||||
eBooks still some way away from students Twelve-year-old Tang Yin is one of the earliest students to test a digital textbook in China. The boy said he was a little 1 when he received the monochromatic (单色的) flat device in April, 2010, because he thought it should be a " 2 cool" laptop. But Tang still cherishes (珍爱) his new equipment like "protecting my 3 ," said the fifth grader. After all, not every student has the opportunity to 4 the eBook, which is worth 2,000 yuan, he said. The 50 eBooks, 5 by Taiwan eBook manufacturer Chuanqi Photoelectric Technology in Yangzhou, Jiangsu Province, enable one class at Yangzhou Sanyuanqiao Elementary School to be the 6 group of students in the Chinese mainland to replace their regular textbooks with electronic ones. Out of l,000 students, Tang' s class was the lucky 7 . "Our school could not 8 the project without the company' s donation," said Yuan Shishan, vice-headmaster of the primary school 9 the digital book is considered environmentally friendly, because it replaces paper books and saves money in the long run, the price is much higher than most Chinese 10 can afford. Also, some technical defects, the 11 of taking notes and monochromatic display, make the eBook fail to meet the expectations of students and teachers. "There's still a(n) 12 way to go before the eBook really plays an important role in education," said the headmaster. According to Yuan, the annual average income of a 13 family in Yangzhou is about 20,000 to 30,000 yuan, and neither the parents nor the school can afford the 2,000 yuan 14 book. The school doesn't allow the students to take their eBooks to their homes. The devices are 15 after class, and are locked in the headmaster's office. | ||||
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科目:高中英语 来源:同步题 题型:阅读理解
Edmund Halley was an English scientist who lived over 200 years ago. He studied the
observations of comets(彗星) which other scientists had made. The orbit of one
particular comet was a very difficult mathematical problem. He could not figure it out.
Neither could other scientists who dealt with such problems.
However, Halley had a friend named Isaac Newton, who was a brilliant mathematician.
Newton thought he had already worked out that problem, but he could not find the
paper on which he had done it. He told Halley that the orbit of a comet had the shape
of an ellipse(椭圆形).
Now Halley set to work. He figured out(觯决,计算出) the orbits of some of the
comets that had been observed by scientists. He made a surprising discovery. The
comets that had appeared in the years 1531, 1607 and 1682 all had the same orbit.
Yet their appearances had been 75 to 76 years apart.
This seemed very strange to Halley. Three different comets followed the same orbit.
The more Halley thought about it, the more he thought that there had not been three
different comets, as people thought. He decided that they had simply seen the same
comet three times. The comet had gone away and had come back again.
It was an astonislung idea! Halley felt certain enough to make a prediction(顶言 )
of what would happen in the future. He decided that this comet would appear in the
year 1758. There were 53 years to go before Halley's prediction could be tested.
In 1758 the comet appeared in the sky. Halley did not see it, for he had died some
years before. Ever since then that comet had been called Halley's comet, in his honour.
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科目:高中英语 来源:同步题 题型:阅读理解
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Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings. The noise that affects sea creatures comes from a number of human activities.It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines.Such noises are added to natural sounds.These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves. Decibels (分贝) measured in water are different from those measured on land.A noise of one hundred and twenty decibels on land causes pain to human ears.In water, a decibel level of one hundred and ninetyfive would have the same effect. Some scientists have proposed setting a noise limit of one hundred and twenty decibels in oceans.They have observed that noises at that level can frighten and confuse whales. A team of American and Canadian scientists discovered that louder noises can seriously injure some animals. The research team found that powerful underwater explosions were causing whales in the area to lose their hearing.This seriously affected the whales' ability to exchange information and find their way.Some of the whales even died.The explosions had caused their ears to bleed and become infected. Many researchers whose work depends on ocean sounds object to a limit of one hundred and twenty decibels.They say such a limit would mean an end to important industrial and scientific research. Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists suspect that noise is a greater danger than they believed.They want to prevent noises from harming creatures in the ocean. |
1.According to the passage, which of the following is increasingly dangerous to sea creatures? |
A.The sound of a car. B.The sound of voices. C.Manmade noise pollution. D.The sound of steps |
2.According to the passage, natural sounds include all of the following EXCEPT________. |
A.sounds made by animals themselves B.ocean drilling C.underwater earthquakes C.the breaking of ice fields |
3.Which of the following is discussed in the third paragraph? |
A.The same noise level produces a different effect on land and in the ocean. B.Different places may have different types of noises. C.The decibel is not a suitable unit for measuring underwater noise. D.Different ocean animals may have different reactions to noises. |
4.According to the passage, what will scientists most probably do in the future? |
A. They will work hard to reduce ocean noise pollution. B.They will protect animals from harmful noises. C.They will try to set a limit of 120 decibels. D.They will study the effect of ocean noise pollution. |
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