若I/O所花费的时间比 CPU 的处理时间短很多,则缓冲区()。
A. 最有效
B. 几乎无效
C. 均衡
D. 以上都不是
查看答案
CPU 输出数据的速度远远高于打印机的速度,为解决这一矛盾,可采用()。
A. 并行技术
B. 通道技术
C. 缓冲技术
D. 虚存技术
-Mike, did you see Mr. Chapman in the office just now?-Yes, he ________, and he looked a little bit nervous.
A. had interviewed
B. was interviewed
C. was being interviewed
D. is being interviewing
The two nurses ________ 100,000 yuan by the police but donated it to victims of the explosion.
A. rewarded
B. would be rewarded
C. have been rewarded
D. had been rewarded