时分复用各路信号的频谱（）。
A.互不重叠
B.互相重叠
C.互相正交
D.以上都有可能
参考答案：D
把0.45，4.5%，0.455从小到大排列是______．
--what effect does the medicine have the blood pressure ?
--- well ,it depends how much you take .
A．with ;on
B．with ; to
C．on ; on
D．on ; to
