题目内容
A．Human beings make fewer errors.B．Human beings do not have to be programmed.C．Human b
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Section B
Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.
The temperature of the Sun is over 5,000 degrees Fahrenheit at the surface, but it rises to perhaps more than 16 million degrees at the center. The Sun is so much hotter than the Earth that matter can exist only as a gas, except all the core. In the core of the Sun, the pressures are so great against the gases that, despite the high temperature, there may be a small solid core. However, no one really knows, since the center of the Sun can never be directly observed.
Solar astronomers do know that the Sun is divided into five layers or zones. Starting at the outside and going down into the Sun, the zones are the corona (光环圈), chromospheres (色环层), photosphere, convection zone, and finally the core. The first three zones are regarded as the Sun's atmosphere. But since the Sun has no solid surface, it is hard to tell where the atmosphere ends and the main body of the Sun begins.
The sun's outermost layer begins about 10,000 miles above the visible surface and goes outward for millions of miles. This is the only part of the Sun that can be seen during an eclipse. such as the one in February 1979. At any other time, the corona can be seen only when special instruments are used on cameras and telescopes to shut out the glare of the Sun's rays.
The corona is a brilliant, pearly white, filmy light, about as bright as the full Moon. Its beautiful rays are a sensational sight during an eclipse. The corona's rays flash out in a brilliant fan that has wispy (稀疏的) spikelike (穗状的) rays near the Sun's north and south poles. The corona is the thickest at the sun's equator.
The corona rays are made up of gases streaming outward at tremendous speeds and reaching a temperature of more than 2 million degrees Fahrenheit. The rays of gas thin out as they reach the space around the planets. By the time the Sun's corona rays reach the Earth, they are weak and invisible.
With what topic is the second paragraph mainly concerned？
A．Languages, mathematics and literature.B．History, physics and languages.C．Chemistry,
More than forty thousand readers told us what they looked for in close friendships, what they expected【C1】______friends, what they were Willing to give in【C2】______, and how satisfied they were【C3】______the quality of their friendships. The【C4】______give little comfort to social critics.
Friendship【C5】______to be a unique form. of【C6】______bonding. Unlike marriage or the ties that【C7】______parents and children, it is not defined or regulated by【C8】______Unlike other social roles that we are expected to【C9】______--as citizens, employees, members of professional societies and【C10】______organizations--it has its own principle, which is to promote【C11】______of warmth, true love, and affection【C12】______two people.
The survey on friendship appeared in the March【C13】______of Psychology. The findings【C14】______that issues of trust and betrayal(背叛)are【C15】______to friendship. They also suggest that our readers do not【C16】______for friends only among those who are【C17】______"like them," but find many【C18】______differ in race, religion, and ethnic(种族的)background. Arguably the most important【C19】______that emerges from the data,【C20】______, is not something that we found--but what we did not.
【C1】
A．It is the nerve cells of a computer.B．It is the brain of a computer.C．It is the eye
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