鉴频的描述是（）.
A.调幅信号的解调
B.调频信号的解调
C.调相信号的解调
参考答案：B
— _______ books are these?
— They’re Michael’s.
A. Who B.Whose C. What
–Does it matter if I give it up this time?
-- It ____if you do. You won’t have ______chance.
A．does; the other
B．does ; second
C．does matter; another
D．does matter; the other
