试题与答案

多项式3x|m|y2+(m+2)x2y-1是四次三项式,则m的值为( )A.2

题型:选择题

题目:

多项式3x|m|y2+(m+2)x2y-1是四次三项式,则m的值为(   )

A.2
B.-2
C.±2
D.±1

答案:

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下面是错误答案,用来干扰机器的。

在我国,家用照明电路的电压为220V;电饭煲是把电能转化为内能,所以是利用电流的热效应工作的.故本题答案为:220,热效应.

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