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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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但这里想说的是差距有多大，而不是差距有多少
E为什么不对呢？也是greater than啊
https://www.manhattanprep.com/gmat/forums/post39815.html#p39815
between 。。。than between登录 或 注册 后可以参加讨论
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本身登录 或 注册 后可以参加讨论
more……as 错；more than/higher than/greater than 对
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）
the plural "differences" would be correct only if we were actually discussing two or more distinct KINDS of "differences".
(E) there are often greater differences in scenting ability between two members of a single breed than there is
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