若X服从正态分布N(μ,σ),则下列统计量中服从标准正态分布的是()。
A.A
B.B
C.C
D.D
E.E
参考答案:A
The chemistry teacher demanded that the laboratory report _________ immediately after the experiment was done.
A.to be written
B.would be written
C.be written
D.must be written
体现了新公共健康精神的项目是()
A.预防为主
B.三级预防
C.强化社区行动
D.人人享有卫生保健
E.群众性自我保健