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【单选题】
设随机变量X,Y都服从均匀分布且相互独立，则A.
二维随机变量（ X , Y ） 一定服从均匀分布
B.
二维随机变量（ X , Y ）不 一定服从均匀分布
C.
二维随机变量（ X , Y ） 一定不服从均匀分布
D.
随机变量 X + Y 一定服从均匀分布
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皮皮学刷刷变学霸
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【简答题】It is a huge watermelon.
【单选题】—Look at the picture . ________ big watermelon it is! —Yes. Let’s see how heavy it is .
A.
What
B.
What a
C.
How
D.
How a
【单选题】Ted: Thanks for your watermelon. It is very nice. James: At the farmer's market round the corner.
A.
How much are they all together?
B.
Have you got anything nicer?
C.
Where did you get it, by the way?
D.
Where else can you see such nice watermelons?
【单选题】—Is the watermelon green? —_______. [ ]
A.
Yes, it is.
B.
It's green.
C.
No, it doesn't.
【单选题】Ted: Thanks for your watermelon. It is very nice. ______ James: At the farmer's market round the comer.
A.
How much are they all together?
B.
Have you got anything nicer?
C.
Where did you get it, by the way?
D.
Where else can you see such nice watermelons?
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