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【题目】为预防自行车生锈,下列做法中不合理的是(

A.车架表面喷涂油漆

B.钢圈表面镀防护金属

C.链条表面涂机油

D.露天放置,日晒雨淋

【答案】D

【解析】防止自行车生锈的措施是保持铁制品表面的清洁干燥,或者在铁制品表面涂保护层,但日晒雨淋会加剧自行车生锈的速度.

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