皮皮学，免费搜题
登录
logo - 刷刷题
搜题
【简答题】
设X，Y为两个相互独立的随机变量，已知X在[0，2]上服从均匀分布，Y服从参数为3的指数分布，则EXY=(    )
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
微信内点击右上角“…”即可分享
反馈
参考答案：
举一反三
【判断题】定期巡视线路的周期是三个月进行一次。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Why not _________ an English club to practise _________ English?
A.
join; speaking
B.
to join; speaking
C.
join; to speak
D.
to join; to speak
查看完整题目与答案
【单选题】$i=0; while ($i<5){ echo $i; } 的循环次数是()
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
【单选题】$i=0; do { echo $i; $i++; } while($i 的循环次数是()。
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
【单选题】$i=0; while ($i<5){ echo $i; $i++; } 的循环次数是()。
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
【简答题】指令中出现的寄存器名作为操作数的寻址方式叫( ),操作对象实质上是寄存器中的( )。
查看完整题目与答案
【单选题】Why not _______ an English club to practice speaking English _______?
A.
join in, as much as possible
B.
join, as much as possible
C.
join, as more as possible
查看完整题目与答案
【单选题】听力原文：M: It's so hard for me to learn English. Why is it so easy for you? W: I didn't know you were having problems. Maybe it's easier for me because I already speak two languages. But also, I really w...
A.
She often talks to English people.
B.
She speaks two languages already.
C.
She always does her homework right after class.
查看完整题目与答案
【单选题】— I don't have a partner to practice English _______. — Why not _______ an English language club? [     ]
A.
to; join
B.
with; to join
C.
with; join
D.
from; join
查看完整题目与答案
【单选题】$i=0; do { echo $i; } while($i<5); 的循环次数是()。
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
相关题目：
【判断题】定期巡视线路的周期是三个月进行一次。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Why not _________ an English club to practise _________ English?
A.
join; speaking
B.
to join; speaking
C.
join; to speak
D.
to join; to speak
查看完整题目与答案
【单选题】$i=0; while ($i<5){ echo $i; } 的循环次数是()
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
【单选题】$i=0; do { echo $i; $i++; } while($i 的循环次数是()。
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
【单选题】$i=0; while ($i<5){ echo $i; $i++; } 的循环次数是()。
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
【简答题】指令中出现的寄存器名作为操作数的寻址方式叫( ),操作对象实质上是寄存器中的( )。
查看完整题目与答案
【单选题】Why not _______ an English club to practice speaking English _______?
A.
join in, as much as possible
B.
join, as much as possible
C.
join, as more as possible
查看完整题目与答案
【单选题】听力原文：M: It's so hard for me to learn English. Why is it so easy for you? W: I didn't know you were having problems. Maybe it's easier for me because I already speak two languages. But also, I really w...
A.
She often talks to English people.
B.
She speaks two languages already.
C.
She always does her homework right after class.
查看完整题目与答案
【单选题】— I don't have a partner to practice English _______. — Why not _______ an English language club? [     ]
A.
to; join
B.
with; to join
C.
with; join
D.
from; join
查看完整题目与答案
【单选题】$i=0; do { echo $i; } while($i<5); 的循环次数是()。
A.
5
B.
4
C.
不确定
D.
死循环
查看完整题目与答案
参考解析：
知识点：
题目纠错 0
发布
创建自己的小题库 - 刷刷题