A.計(jì)算機(jī)在發(fā)送數(shù)據(jù)時(shí)將模擬信號(hào)轉(zhuǎn)換為相應(yīng)的數(shù)字信號(hào)
B.計(jì)算機(jī)在發(fā)送數(shù)據(jù)時(shí)將數(shù)字信號(hào)轉(zhuǎn)換為相應(yīng)的模擬信號(hào)
C.計(jì)算機(jī)在接收數(shù)據(jù)時(shí)將模擬信號(hào)轉(zhuǎn)換為相應(yīng)的數(shù)字信號(hào)
D.計(jì)算機(jī)在接收數(shù)據(jù)時(shí)將數(shù)字信號(hào)轉(zhuǎn)換為相應(yīng)的模擬信號(hào)