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【判断题】
如果信道中传输的是模拟信号，则需要调制器将原始信号转换为频带适合信道传输的信号。如果信道中传输的是数字信号，则可直接传输。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】He is believed to be one of the best _____ composers. Although old, he is very much ____ and he can give a ______ description of what happened.
A.
living, alive, lively
B.
live, lively, alive
C.
alive, live, living
D.
lively, living, alive
【简答题】药物毒性反应中的“三致反应”包括致畸、致癌和( )
【单选题】Why was the mans body dug up from a Muslim cemetery?
A.
He is believed to be homosexual.
B.
He is not a Muslim.
C.
He was buried in the wrong place.
D.
His family doesn't want him to be buried there.
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