I think a good friend _____ me laugh. [ ]
A. takes
B. makes
C. let
D. have
答案:B
铝酸盐水泥有何特点?
引起中断的中断源有5种,分别为I/O中断、数据通道中断、时钟中断、程序中断和
A.存取越界中断
B.故障中断
C.奇偶校验错中断
D.数据溢出中断