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Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now listen to the news. In Bangladesh, officials say the Ganges Rive may flood ______.
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Trillions of incredibly tiny diamonds, possibly formed by a dying star before the solar system was born 4.5 billion years ago, have been found by researchers (26) four meteorites. The powder-like diamonds could be among the oldest things in the (27) , said Roy Lewis, senior research associate at the University of Chicago. The diamonds may (28) clues about the chemistry of stars, and if scientists can determine how they formed, that could suggest better ways of manufacturing tiny diamonds for (29) purposes, he said. "It’s quite possible that nature is doing it more (30) than we’ve been doing it," he said. "So maybe we’ve got something to learn." The new find is (31) , said John Wood, staff scientist at the Harvard-Smithsonian Centre for Astrophysics. Although diamonds have been found before in meteorites, they were formed relatively recently (32) the shock of impact, he said in a telephone interview. But Wood said the new report made him "quite sure" the newly found diamonds are older than the sun. Lewis said researchers never expected to find diamonds when they started (33) a stone-like meteorite that had plunged into Mexican cornfield in 1969. They were studying an unusual carbon dust in the meteorite, and to purify the sample they went though several steps to dissolve other materials. They expected the sample to remain black through the purification, but to their surprise in the final step it turned (34) . Lewis said they believed the final stage had dissolved the carbon they wanted to study. But tests showed that the white residue was in fact made of carbon. Other tests found that it contained an unusual combination of forms of the gas xenon, (35) that it came from outside the solar system. Still another battery of tests (36) the residue as diamond dust, so fine that a row of 20,000 grains would extend about the (37) of a human hair. The researchers also found diamonds in three other meteorites, Lewis said. Tests showed all four meteorites were as old as the solar system, and that the embedded diamonds did not form within the meteorite (38) of collisions. So the diamonds must have (39) somewhere else before the meteorites formed, making them as old or older than the solar system. The diamonds may have formed in the upper atmosphere of a star in the late "red giant" stage, where the temperature and abundance of hydrogen could (40) diamonds to form as carbon gas condenses.
A twenty-year-old immigrant, Levi Strauss, came to the United States in 1850 to seek his fortune in the gold fields. But strangely enough, this man made his fortune on heavy canvas that he found suitable for working clothes. Strauss’jeans were particularly good for prospectors and cowboys. In the early days of jeans, this man couldn’t have guessed that his pants, made only for rough work, would become so popular at ail levels of society. Yes, this is a fact: jeans have become fashionable in our society. Furthermore, these pants have come to symbolize changes in social attitude. In the last decade or two we have seen movements toward equality as well as defiance of authority. Jeans, now worn by everybody, can be said to symbolize these changes for the better. In the past, only men wore jeans, and these men were at the bottom—socially and economically. Jeans were worn by truck drivers, farm and factory workers. Today, jeans no longer are looked down upon. They are worn by both men and women, by both skilled and unskilled workers, by both employees and employers. This common way of dressing symbolizes respect for individuality, no matter what your occupation or sex. In the fight against authority, young people have been the leaders. So it is natural that teenagers would defy parents and school administrators over the right to wear jeans to class and win. Jeans are the typical dress of civil rights marchers, fans at rock concerts, "hippies" returning to nature, and serious college students. Because everyone can be comfortable in them, the blue jeans invented for the use of workers are now accepted almost anywhere, anytime. This is true not only in the United States, but in many other countries in the world. I strongly agree with the following statement: "Old or new, glorified or plain, jeans are likely to be around for a long time to come. Already they have succeeded where statesmanship has failed. Although unable to speak the same language, the inhabitants of this embattled planet have at least agreed to wear the same pants.\ The author is of the opinion that ______.
存储容量以( )为单位。
Questions 14 to 17 are based on the following passage. At the end of the passage, you will be given 20 seconds to answer the questions. Now listen to the passage. What is the responsibility of the subeditors in the newspaper office
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