关于急性呼吸衰竭的病因,下述哪项是错误的?
A.化学中毒
B.大量胸腔积液
C.尘肺
D.气胸
参考答案:C
It was____to watch small childen play games.
A.pleased
B.pleasure
C.glad
D.fun
试修改下面消费者生产者问题解法中的错误 Producer: Begin Repeat … Produce an item in nextp; Wait(mutex); Wait(empty); Buffer(in):=nextp; (in:=(in+1)mod n;) Signal(mutex); Until false; End Consumer: Begin Repeat Wait(mutex); Wait(full): Nextc:=buffer(out); Out:=out+1; Signal(mutex); Consume item in nextc; Until false; End