题目信息
Often major economic shits are so gradual as to be indistinguishable at first from ordinary fluctuations in the financial markets.
A:so gradual as to be indistinguishable
B:so gradual they can be indistinguishable
C:so gradual that they are unable to be distinguished
D:gradual enough not to be distinguishable
E:gradual enough so that one cannot distinguish them
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正确答案：
A:so gradual as to be indistinguishable
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