题目是要求你undermine那个东西是黑洞的解释。。。所以,如果
A few skeptics have
argued that the concentration of mass
necessary to explain the speed of the
(20)whirling gas is not necessarily a black
hole: the concentration in M87 might
be a cluster of a billion or so dim stars.
被证实是存在的话,就是最有效的undermine
举报
twice the size/number/rate/amount etc
是那个指代
Thanks Gufeng. I got your point. I was fooled by "that is mention in the last sentence of first paragraph".
我觉得你举这个例子不恰当。。。
题目已经用到perviously,表明伴随的状态,以说明比较不是不可以。。。
最后这题还是没能说服我。总结一下吧
A的问题是 paying的修饰模糊。。。如果放到句首或者做主语插入句就没有问题
B的for which是乱来。。。
C的compare to是错的,上来直接必杀的选择
D的required重复。。。instead of已经构成比较,前面laws requires已经说明了require,后面再加required是画蛇添足
E的as opposed to是awkward的比较结构。。。这个地方requiredd因为as opposed to用得不好,对构成的比较结构不做评论
各位,尽量在专题区内讨论。感谢配合!
good luck!
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