单项选择题

设随机变量，则E(X)=（   ）

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Which of the following statements is NOT TRUE?A.Getting off to work with a minimum effort helps save ones energy.B.Dr. Kletman explains why people reach their peaks at different hours of day.C.Habit helps a person adapt to his own energy cyclE.D.Children have energy cycles, too.
A.Getting
B.
B.Dr.
C.
C.Habit
D.
D.Children
E.
多项选择题
新生儿缺氧缺血性脑病脑损伤主要累及部位正确的是
A．A足月新生儿易累及额颞部
B．B足月新生儿易累及矢状旁区
C．C早产儿易累及苍白球、纹状体
D．D早产儿易累及脑室周围白质区
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