下列( )操作前应该进行开中断。
A.保护现场
B.恢复现场
C.执行中断服务程序
D.以上都应该
参考答案:C
使子宫内膜增生:
A.雌激素B.孕激素C.雄激素D.促卵泡素E.黄体生成素
There are only _________ new words in the passage, but I know _________ of them. [ ]
A. some; all
B. a few; none
C. lots of; a few