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【简答题】
设随机变量 X N ( 2 , 4 ),则 P ( X ≤ 0 ) = ___ ___ . (附:Φ( 1 ) = 0.8413 )(答案请填写小数,保留小数点后4位)
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举一反三
【单选题】Do you know the girl over there?（）
A.
How can I know?
B.
Yes, I remember it now.
C.
It's Sam, my teacher's daughter
D.
She is a good girl.
【简答题】在拉曼光谱中，只有伴随分子 α发生变化的分子振动模式才能产生拉曼散射。
【单选题】What does Peter think about the girl over there?
A.
She will not enjoy dancing with him.
B.
She cannot find her way out to the dance floor.
C.
She will be only too glad to accept his invitation.
D.
She is not his type.
【简答题】三大供能营养素是指 、 、 。
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