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Invention can be ________ as it may suddenly begin just by noticing something usual.

Aaccidental Bcareless

Cnecessary Dimaginative

 

A

【解析】A 考察形容词辨析。Accidental偶然的,careless粗心的;necessary必要的;imaginative虚构的,富于想象的;根据suddenly可知A正确。句意:发明有时也是偶然的,因为它仅仅开始于注意到了某个平常的某个东西。故A正确。

 

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