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题库 / Prep2007E1-SC-112
Though certain breeds of dog are renowned for their sense of smell, there is often a greater difference in scenting ability between two members of a single breed as there is between members of different breeds.
is often a greater difference in scenting ability between two members of a single breed as there is
is often more difference in scenting ability between two members of a single breed as to find one
is often a greater difference in scenting ability between two members of a single breed than
are often greater differences in scenting ability between two members of a single breed as there are
are often greater differences in scenting ability between two members of a single breed than there is
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虽然difference确实是可数名词
但这里想说的是差距有多大，而不是差距有多少
we're talking about only one KIND of difference
这道题做题时间太久了。主干出来就应该看到是比较级的题啊！！！！a.greater。。。as搭配错误 b。more..as搭配错误 c。greater than 对的 d。e和前面一样
E为什么不对呢？也是greater than啊
https://www.manhattanprep.com/gmat/forums/post39815.html#p39815
between 。。。than between
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greater……than……
且这之间单复数要一致
E的比较对象不对，加了there is之后，比较的成了difference本身
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Because there is only one category mentioned (sense of smell) I think the word "difference" is appropriate.
more……as 错；more than/higher than/greater than 对
另外比较的时候，被比较部分省略名词的单复数与比较部分必须一致，如果单复数不一致，需要补出名词。如：
Wrong: Her company did better last year than those of her competitors.
Right: Her company did better last year than the companies of her competitors.
之于本题，前面是a greater difference, 后面做了省略，则宾语也是a difference，表示三个或以上成员之间的差异程度也只有一个（联想数学里的范围概念，用最大的减最小的）
两个members之间在嗅觉方面的差异肯定是一个差异，并且greater比较的是差异的程度，而不是差异数量的多少，用单数。
d， greater than 不是as，看选项时就忘记这些不同的点了。。。。不然可以做对
RON： we're talking about only one KIND of difference (namely, the difference in smelling ability).
the plural "differences" would be correct only if we were actually discussing two or more distinct KINDS of "differences".
I think choice (E) wrong because two verbs in this choice are not in the same quantity.
(E) there are often greater differences in scenting ability between two members of a single breed than there is
数量级！
https://www.manhattanprep.com/gmat/forums/post39815.html#p39815