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题库 / OG2016-SC-128
Scientists have recently found evidence that black holes—regions of space in which matter is so concentrated and the pull of gravity so powerful that nothing, not even light, can emerge from them—probably exist at the core of nearly all galaxies and the mass of each black hole is proportional to its host galaxy.
exist at the core of nearly all galaxies and the mass of each black hole is proportional to
exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of
exist at the core of nearly all galaxies, and that the mass of each black hole is proportional to
exists at the core of nearly all galaxies, and that the mass of each black hole is proportional to that of
exists at the core of nearly all galaxies and the mass of each black hole is proportional to that of
题目分析：
本题是两个同位语从句的并列，即，
evidence that black holes probably exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of its host galaxy.
选项分析：
A选项：较对象不对等。这个情况出现在划线部分的后半句，即：
the mass of each black hole is proportional to its host galaxy.
每一个黑洞的质量应该是和整个星系的质量相比较，而不能是和整个星系本身比较。应改为：
the mass of each black hole is proportional to the mass of its host galaxy.
B选项：Correct. 本选项在逻辑和语法上均是正确的。
C选项：比较错误同(A)。
D选项：因为主语是black holes，所以谓语动词exist也应该用复数。
E选项：主谓一致错误同(D)。
本题是两个同位语从句的并列，即，
evidence that black holes probably exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of its host galaxy.
请问galaxies和and中间的逗号是加不加都可以吗？
嗯～其实都可以，至少不应作为排除这个选项的方式。
我一直理解的是 ,and 后面一定是一个完整的句子，有主谓宾。
所以,and后面可以是和前面并列的成分吗？
还是两个元素并列之间可以用AandB也可以是A, and B？
我记得三者直接最后一个并列是A,B,and D
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The mass of each black hole is proportional to (that of) its host galaxy，前后比较的对象需要对等。
evidence that black holes probably exist at the core of nearly all galaxies and the mass of each black hole is proportional to that of its host galaxy.
主语是black holes, 复数，排除DE。
比较对象是the mass， is proportional to 后面要用that of its host galaxy, B对。
首先后面的从句要加上that
其次黑洞的mass要与主星的mass相比，因此加上that
proportional成比例的，注意前后比较对象的对等，that of
proportional成比例的
be proportional to 表示成比例 比较所以两边要平行
1. found evidence that A and that B 平行
2. the mass vs mass 比較對象要同類
evidence that。。。。 and that。。。平行
去除中间修饰部分简化句子：
evidence that black holes probably exist at the core of nearly all galaxies and that the mass of each black hole is proportional to that of its host galaxy.
mass是质量，质量和质量相比较
C选项中mass在天文学中是“质量”，黑洞的质量要跟星系的质量作比较。
proportional是比较marker
A选项：缺that,在the mass of each black hole 之前；同时比较对象不对等：the mass of each black hole is proportional to the mass of its host galaxy.
C选项：the comma appears to signal that the final part of the sentence is intended as an independent clause expressing a separate claim rather than describing part of the scientists' discovery. But if it were intended in that way, it should be set off as a separate sentence, not conjoined with the preceding clause.
E选项：缺that
终于完全分析对一次了
啊 读句子不认真，单复数排除DE，比较对象排除AC，得B。
关于A 没有that的问题我觉得这里应该是一个错误点，如果去掉that就变成前句scientists和the mass of两句并列了，但是后面的the mass of明显是和that从句并列，没有的话会产生歧义
A的是不是也少了个that，第二个宾语从句的that不可以省略吧
and后面的that可以省略吗？
mass 质量
错选E，主谓一致