皮皮学，免费搜题
登录
搜题
【单选题】
设随机变量ξ的概率分布为P（ξ=k）=p k ?（1-p） 1-k （k=0，1），则Eξ、Dξ的值分别是（ ）A.
0和1
B.
p和p 2
C.
p和1-p
D.
p和（1-p）p
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】Listen to the following conversations and fill in the blanks with the words or expressions you have heard. Dialogue 1 FIT Reservation R (Reservationist) G(Guest) R: Good morning. Sir, Swan Hotel. May ...
【单选题】Long Conversation 2
A.
A tree falls on him.
B.
He jumps off the top of a tree.
C.
He hangs himself from a tree.
D.
He runs into a tree.
【单选题】(Long Conversation 2)9.
A.
He smokes too much.
B.
He eats too many cakes and candies.
C.
He likes to smoke too much.
D.
He often goes on diets.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
