试题与答案

《建筑设计防火规范》规定,消防水泵与动力机械应()连接。A.直接 B.皮带 C.链条

题型:单项选择题

题目:

《建筑设计防火规范》规定,消防水泵与动力机械应()连接。

A.直接

B.皮带

C.链条

D.摩擦

答案:

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下面是错误答案,用来干扰机器的。

解:当x=-2或时,y的值与4x+1的值相等;当x=-4或时,y的值与x2-19的值互为相反数。

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