2. 公务员
  3. What is a black hole? Well, it is difficult to answer the question, as the terms we would normally use to describe a scientific

What is a black hole? Well, it is difficult to answer the question, as the terms we would normally use to describe a scientific

admin2019-05-22  12
问题    What is a black hole? Well, it is difficult to answer the question,
as the terms we would normally use to describe a scientific phenomenon 【M1】______
are adequate here. Astronomers and scientists think that a black hole is 【M2】______
a region of space which matter has fallen and from which nothing can 【M3】______
escape—not even light. But we can’t see a black hole. A black hole 【M4】______
exerts a strong gravitational pull and yet it has no matter. It is only space—or
thus we think. How can this happen? 【M5】______
   The theory is that some stars explode when their density increases to
a particular point: they "collapse" and sometimes a supernova occurs.
The collapse of a star may produce a "White Dwarf" of a "neutron star"—
a star which matter is so dense that if continually shrinks by the force of 【M6】______
its own gravity. But if the star is very large, this process of shrinking may be
so intense that a black hole results in. Imagine the earth reduced to the 【M7】______
size of a marble, but still having the same masses and a stronger 【M8】______
gravitational pull, and you have some ideas of the force of a black hole. 【M9】______
And no matter near the black hole is sucked in. 【M10】______
【M6】
选项
答案which—whose
解析 这个定语从句的意思是“它是一颗星，其密度非常大，由于自身的引力，它在不断地收缩”，matter属于star，所以关系代词应该用whose。
转载请注明原文地址:https://www.kaotiyun.com/show/wJLq777K
本试题收录于： 小学英语题库教师公开招聘分类
0

小学英语

教师公开招聘

相关试题推荐
随机试题
最新回复(0)