Their sole fault was a failure to recognize all the factors involved.A.maximumB.usualC.ini

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Their sole fault was a failure to recognize all the factors involved.

A.maximum

B.usual

C.initial

D.only

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗