Researchers hypothesize that granitic soil is the ideal construction material for the desert tortoise because it is not so hard that it makes burrowing difficult or so soft that it could cause tunnels to collapse.
A. so hard that it makes burrowing difficult or so soft that it could cause
B. hard enough to make burrowing difficult or soft enough as to cause
C. so hard as to make burrowing difficult or soft enough so it causes
D. as hard as to make burrowing difficult or as soft as to cause
E. too hard, making burrowing difficult, nor too soft, so as to cause (A)
why not D, 到底有没有as..as地用法?以前的讨论也没说清楚
as...as和so...that的意思不同.
as...as不能表达因果关系.
没有as adj as to的用法吧
再者就算想用as as,这里也只能用not so far as
句子意思是如此。。。以致
PS:这里的as...as...也没有很好地平行
见下帖
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