单项选择题

在GSM中，信道编码采用了哪种编码格式：

A．波形编码
B．声音编码
C．混合编码

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单项选择题

5. Are our clothes simply something we wear? A、Yes, even clothes which are inappropriate. B、No, they also show our social status. C、Yes, but they have a decorative function. D、No, they represent all aspects of who we are.

判断题

概率P(A)和P(A|B)的区别是它们求A的概率时参照样本空间不同，P(A)参照的样本空间为S，而P(A|B)参照样本空间为B.（）正确错误

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