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【简答题】
设随机变量(X,Y)服从二维正态分布N(【图片】,1;0,1;0), 记【图片】则EZ=____.(保留小数点后2位)
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【单选题】What are you going to do in the 2022 Winter Olympics?().
A.
Yes, I have been there.
B.
I'm going to be a volunteer.
C.
I am traveling abroad.
【简答题】You are a college student and want to be a volunteer in Beijing 2022 Olympic Winter s. Write a letter to Mrs. Wang, the secretary of Beijing Olympic s Committee, to apply for the voluntary wor...
【单选题】The 2022 Winter Olympic Games will _____in Beijing.
A.
are held
B.
will be held
C.
will hold
D.
are going to hold
【单选题】The2022 Winter Olympics, officially known as the______ Olympic Winter Games.
A.
21th
B.
22th
C.
23th
D.
24th
【单选题】T he Winter Olympics ______ in Beijing in 2022 .
A.
had held
B.
will hold
C.
will be held
【简答题】坍圮了一段段高墙又散落了玉砌雕栏 圮：
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