自发性气胸()
A.以阻塞性通气功能障碍为主
B.以限制性通气功能障碍为主
C.混合性通气功能障碍
D.以弥散障碍为主
E.以呼吸中枢功能障碍为主
参考答案:B
同义句转换。
1. Lucy has more curly hair than Lily.
Lucy's hair_____ more curly than _____.
2. Both girls go to many parties.
The two girls _____ go to _____ _____ parties.
3. His new watch is not the same as mine.
His new watch is _____ _____ mine.
4. I am a little heavier than her.
She is a little _____ than me.
5. I am quieter than her.
She _____ _____ than me.
6. My English is very good.
I'm _____ _____English. 或者 I do _____ _____ English.
有五个计算型的进程P1、P2、P3、P4、P5依次紧接着进入就绪队列,它们的优先级和需要处理器的时间如下表所示:
约定当所有进程均进入就绪队列后才开始调度,且忽略进程进入就绪队列和进行调度所花费的时间。 要求:
写出采用“先来先服务调度算法”的进程调度次序及进程平均等待时间。