设随机变量X服从参数A=1的指数分布,即X的概率密度函数为
则条件概率P(X>5X>3)等于().
A.e-1
B.e-2
C.-3
D.e-5
参考答案:B
Both of ______ heard a loud noise. It was _______ thunder. [ ]
A. they; like
B. them; likes
C. them; liking
D. them; like
在电动机的控制线路中一般过载保护用什么进行保护?