问题描述:
[单选]
设X服从参数为λ>0的指数分布,其数学期望EX=()
A.λ
B.λ的倒数
C.λ的平方
D.λ的负数
参考答案:查看无
答案解析:无
☆收藏
答案解析:无
☆收藏
上一篇:Cross scavenging requires the fitting of()to prevent air or exhaust gas escape when the piston is at the top of the stroke.
下一篇:What monitoring device best indicates the load being carried by a diesel engine?
- 我要回答: 网友(216.73.216.96)
- 热门题目: 1.测量曲轴臂距差时,要求在() 2.测量曲轴臂距差还要求在()时 3.柴油机冷态即环境温度下测量曲
