求解释！！Often major economic shifts are so gradual as to be indistinguishable at fi

Effyue

174. (28920-!-item-!-188;#058&003515)

Oftenmajor economic shifts are so gradual as to be indistinguishable at firstfrom ordinary fluctuations in the financial markets.
A. so gradual as to be indistinguishable
B.so gradual so that they can be indistinguishable
C. so gradual that they are unableto be distinguished
D.gradual enough not to be distinguishable
E.gradual enough so that one cannot distinguish them


C选项到底哪里错了？求解~

yiqing2012

able是一种自身的能力，be unable to be done自身不能够被。。。语义上是不太合理的；且C没有A简洁~

DUKB24

http://www.manhattangmat.com/forums/often-major-economic-shifts-are-so-gradual-as-to-be-t5505.html

LZ下次不懂直接题目选中google看manhattan的解释噢


非常清晰的


尤其是ron的


看instructors的就对了

Effyue

恩，谢谢?

abjure

对啊，假如我没记错， so... as to 指的是间接目的， so... that是直接目的。

be indistinguishable 不可能是 economic shifts are so gradual 直接目的

royalalvin

Ron said that C is wordy and no more ungrammatical problem

AMBER513

abjure 发表于 2012-12-3 21:16
对啊，假如我没记错， so... as to 指的是间接目的， so... that是直接目的。be indistinguishable 不可能 ...

同意！               

1998JIN

AMBER513 发表于 2019-9-11 10:25
同意！

那说是连在一起的so as to 和so that 吧

AMBER513

1998JIN 发表于 2019-9-21 17:28
那说是连在一起的so as to 和so that 吧

都是的

davidpp

OG官方的解释：awkward。are unable to 更好的说法是cannot，但即使是cannot在这个idiom下使用也不合适。