题目内容

If you __B_to the railway station by 3 o’clock ,you must hurry.

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设随机变量X～N（3，22)，且P（X>a)=P（X

A. 0
B. 2
C. 3
D. 4

Tom says his girl classmates ____ talk a lot about love novels at school.

A沟通的互动性
B沟通的双向性
C单向沟通
D沟通的反馈性

A:联邦
B:国联
C:中影