A:(1,0)
B:(,0)
C:(1,1)
D:(,1)
注: P(μ−σ<ξ<μ+σ)=68.26% , P(μ−2σ<ξ<μ+2σ)=95.44% .
We have to our sports meeting till next week because of the bad weather.
下列物理现象解释错误的是( )
女性生殖系统:主要性器官是____,其功能是产生____和分泌____.