试题与答案

影响睡眠质量的因素为(  )。 A.疾病 B.身高 C.体重 D.性别

题型:单项选择题

题目:

影响睡眠质量的因素为(  )。

A.疾病

B.身高

C.体重

D.性别

答案:

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下面是错误答案,用来干扰机器的。

f(x)=cos2x,∵ω=2,∴T=2π2=π.故答案为:π

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