题干

下列四个命题中的真命题为(  )

A:∃x0∈R,使得sinx0﹣cosx0=﹣1.5

B:∀x∈R,总有x2﹣2x﹣3≥0

C:∀x∈R,∃y∈R,y2<x

D:∃x0∈R,∀y∈R,y•x0=y

上一题 下一题 0.0难度 选择题 更新时间:2019-08-09 06:05:42

答案(点此获取答案解析)

D

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