考研管理类联考综合能力真题答案解析.doc
8页1、考研管理类联考综合才能真题答案解析考研管理类联考综合才能真题答案解析Passage 3What is a black hole? Well, it is difficult to answer this question, since the terms we would normally use to describe a scientific phenomenon are inadequate here. 1) _. A black hole exerts a strong gravitational pull and yet it has no matter. It is only space or so we think. How can this happen?2) _. From earth, a supernova looks like a very bright light in the sky that shines even in the daytime. Supernova was reported by astronomers in the seventeent
2、h and eighteenth centuries. Some people think that the Star of Bethlehem could have been a supernova. The collapse of a star may produce a White Dwarf of a neutron star a star, whose matter is so dense that it continually shrinks by the force of its own gravity. But if the star is very large (much bigger than our sun), this process of shrinking may be so intense that a black hole results. 3) _. Amy matter near the black hole is sucked in. It is impossible to say what happens inside a black hole.
3、 Scientists have called the boundary area around the hole the “event horizon”. We know nothing about events that happen once objects pass this boundary. But in theory, matter must behave very differently inside the hole.The most convincing evidence of black holes es from research into binary star systems. Binary stars, as their name suggests, are twin stars whose position in space affects each other. In some binary systems, astronomers have shown that there is an invisible panion star, a “partne
4、r” to the one that we can see in the sky. Matter from the one that we can see is being pulled towards the panion star. Should this invisible star, which exerts such a great force be a black hole? Astronomers have evidence of a few other stars too, which might have black holes as panions.A For exle, if a man fell into a black hole, he would think that he reached the center of it very quickly. However, an observer at the event horizon would think that the man never reached the center at all.B Ther
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