1.What would be the best title for this passage?
A.How scientists observe the early universe
B.Which came first,black holes or galaxies
C.Some evidence about black holes and galaxies
D.A funny question about the early universe
解析:主旨大意题。本文主要是关于科学家对黑洞和星系哪一个先出现这个问题的研究成果,故答案为B。
答案:B
2.The underlined word “revealed” in Paragraph 4 can be replaced by .
A.expected
B.formed
C.started
D.shown
解析:词义猜测题。根据本段后面的内容可知,这是早期研究的结果,故reveal表示“显示”,答案为D。
答案:D
3.The difference in size between the black hole's mass and the mass of the surrounding galactic bulge is .
A.usually fixed
B.so far unknown
C.very likely to change
D.very unbalanced
解析:细节理解题。根据第四段“Generally,the black hole's mass was seen to be about one 1,000th the mass of the surrounding galactic bulge.”可知,答案为A。
答案:A
4.Which is the next question astronomers have to answer according to the passage?A.Why the black hole started growing first.
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