采样与复现
参考答案:
把连续信号变换为脉冲序列的过程称采样过程;将离散信号转换复原成连续信号的过程称信号复现过程。
条件p:x>1,y>1,条件q:x+y>2,xy>1,则条件p是条件q的[ ]
A.充分而不必要条件
B.必要而不充分条件
C.充要条件
D.即不充分也不必要条件
He found it no pleasure ____ himself of the habit of playing computer games day and night.
A.ridding
B.getting rid
C.changing
D.defending