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Newmedicinesandinstruments everydaytoextendlife.A．dev...

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問題詳情：

Newmedicinesandinstruments everydaytoextendlife.A．dev...

New medicines and instruments every day to extend life.

A．develop B．are being developed

C．are developing D．have developed

【回答】

B

【解析】

句意：為了延長生命，每天都在研製新的*物和儀器。考查動詞語態辨析題。new medicines and instruments是動詞develop的受動者，需用被動語態，ACD三項都是主動語態，可排除。根據句意結構，可知選B。

知識點：被動語態

題型：選擇題

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