2011年08月08日 07时40分，《今年英语:2011自考英语（二）复习资料：UNIT2》由出国留学网liuxue86.com英语编辑整理.
3 句子汉译英
黑洞是什么，天文学家还没有完全解决这个问题。
Astronomers have not yet fully solved the problem of what a black hole is.
据说黑洞可以将其周围的一切物体，如星星吞食掉。
It is said that black holes are able to swallow up all the objects around them, such as stars .
对黑洞的研究刚刚开始，各种各样的假说层出不穷。
The research of black holes is just beginning and speculation about them are endless.
科学家仍不能说出黑洞内发生了什么。
Scientists still can not tell what happens inside a black hole.
It is still impossible for scientists to tell what happens inside a black hole.
如果我们认识了黑洞，黑洞就不那么可怕了。
If we understood black holes, they would not be so fearful .
Black holes will not be so fearful if we get to know them.
单元课后练习
Ⅰ.Word Spelling
1.密度 n. density _ _ _ _ _ _ _ _
2.（使）倒塌，（使）崩溃 v. collapse _ _ _ _ _ _ _ _
3.边界线，边界 n. boundary _ _ _ _ _ _ _ _
4.永恒的，经久不变的 a.c _ _ _ _ _ _ _ _
5.基础，根据 n.b _ _ _ _ _ _ _ _
6.发射，发动 v.l _ _ _ _ _ _ _ _
7.双胞胎之一 a.t _ _ _ _ _ _ _ _
8.同伴，同事 n.c _ _ _ _ _ _ _ _
9.人类 n.m _ _ _ _ _ _ _ _
10.推测，猜测 n.s _ _ _ _ _ _ _ _
11.吞 v.s _ _ _ _ _ _ _ _
12.不充分的 a.i _ _ _ _ _ _ _ _
13.物质 n.m _ _ _ _ _ _ _ _
14.情况，环境 a.c _ _ _ _ _ _ _ _
15.发生，出现 v.o _ _ _ _ _ _ _ _
16.强烈的 a.i _ _ _ _ _ _ _ _
17.证据 n.e _ _ _ _ _ _ _ _
18.看不见的 a.i _ _ _ _ _ _ _ _
19.宇航员 n.a _ _ _ _ _ _ _ _
20.热带的 a.t _ _ _ _ _ _ _ _
Ⅱ.Word Form
1.Supernovae____(report) by astronomers in the seventeenth and eighteenth centuries.
2.Imagine the earth reduced to the size of a marble, but still____(have) the same mass, and you have some idea of the force of a black hole.
3.If one____(make) a journey over the Continents one would find every kind of surface including mountain ranges, plains, and empty areas covered permanently by ice and snow.
4.And astronomers are planning a new observatory to study the individual exploding stars____(believe) to be black holes.
5.Matter from the one which we can see____(pull) towards the companion star.
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