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

Aaccidental Bcareless

Cnecessary Dimaginative

 

A

【解析】A 考察形容詞辨析。Accidental偶然的,careless粗心的;necessary必要的;imaginative虛構(gòu)的,富于想象的;根據(jù)suddenly可知A正確。句意:發(fā)明有時(shí)也是偶然的,因?yàn)樗鼉H僅開(kāi)始于注意到了某個(gè)平常的某個(gè)東西。故A正確。

 

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