as...as 和 是 so ...that有差吗？

lollipop90

?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.B.hard enough to make burrowing difficult or soft enough as to cause
C.C.so hard as to make burrowing difficult or soft enough so it causes
D.D.as hard as to make burrowing difficult or as soft as to cause
E.E.too hard, making burrowing difficult, nor too soft, so as to cause

答案是A，我选得是d.
是不是not 在前面， as ......as 就改变了句意？
求解答。

lollipop90

求解答~呀么求解答。

kobemvp

有as...as to do sth 的用法么？

Zacks

我也正好做到这题。as...as是“像...一样”的意思，没有“太...以至于...”的意思。若把D选项中前一个as改成so，变成so...as to就对了。

brucezhang83

as xxx as xxx和so xx that本身意思都不一样吧，
soxx that 表达的是这样xx以至于xxx有种因果关系，
as xx as xx应该只是一种程度的比较