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【单选题】
按照 信道的冲激响应 是否随时间变化可以分为 恒参信道 和()A.
随参信道
B.
连续信道
C.
调制信道
D.
恒参信道
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反馈参考答案：
举一反三
【单选题】He hasn’t slept at all for three days.____he is tired out.
A.
It is no wonder
B.
There is no need
C.
There is no point
D.
It is no way
【单选题】He hasn't slept at all for 3 days. he is tired out. [ ]
A.
There is no point
B.
There is no need
C.
It is no wonder
D.
It is no way
【简答题】计算机的主要组成部分可以归纳为以下五个部分:( )、 ( ) 、 ( ) 、 ( ) 和( ) 。
【单选题】Even if there is no scientific proof secondhand smoke causes cancer, there is no reason why nonsmokers should be forced to take this risk.
A.
which
B.
that
C.
when
D.
where
参考解析：
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