Ⅳ C-E Translation
1.这个收缩的过程如此强烈，以至于黑洞产生了。
2.直到最近天文学家们才开始研究黑洞。
3.但是从理论上说，物质在黑洞里的行为一定非常不同。
4.黑洞最强有力的证据来自对双星系的研究。
5.有一天也许人类也会遭此命运。
单元自测答案 Unit 2
Ⅰ Word Spelling
1.density 2.collapse 3.boundary
4.constant 5.basis 6.launch
7.twin 8.companion 9.mankind
10.speculation 11.swallow 12.inadequate
13.matter 14.circumstance 15.occur
16.intense 17.evidence 18.invisible
19.astronaut 20.tropical
Ⅱ Word Form
1.were reported 2.having 3.made
4.believed 5.is being pulled 6.swallowing
7.convincing 8.totally 9.consists
10.coloured
Ⅲ Vocabulary and Structure
1.B 2.D 3.A 4.A 5.C
6.D 7.B 8.C 9.A 10.D
Ⅳ C-E Translation
1.This process of shrinking is so intense that a black hole results.
2.It is only recently/It is not until recently that astronomers have begun specific research into black holes.
3.But in theory， matter must behave very differently/in a very different manner inside the black hole.
4.The most convincing evidence of black holes comes from research into binary star systems.
5.Mankind may one day meet this fate.