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The machine is designed to _______ peopl...

The machine is designed to _______ people recycle wastes to a great degree but the result still remains to be seen.

A.aid

B.help

C.assist

D.improve

 

B 【解析】 试题解析:aid急救,正式用语,强调急需帮助;help帮助,普通用词,侧重积极为他人提供帮助;assist强调在帮助时以受助者为主;improve提高,利用。句意是设计这种机器是为了帮助人们更大程度的回收废品,但是结果如何还需验证。故选B。 考点:词义辨析。
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