气管环和气管黏膜毛细血管MAP为（）。 A.20mmHg B.24mmHg C.28

The nurse is providing preoperative care to a client scheduled for an appendectomy. Which statement regarding pain control is most appropriate ？（）

A．"There's no need to ask for pain medication, you'll receive it on a schedule. "

B．"Take your pain medication after walking so that you won't feel dizzy. "

C．"Take your pain medication before your pain becomes intense. "

D．"Use as little pain medication as possible to avoid addiction. "

房地产经营

绝经期尿中促性腺激素的变化正确的是（）

A.无变化

B.微量

C.不确定

D.减少

E.增加

倾斜井巷内使用串车提升时，在变坡点下方略（）1列车长度的地点，设置能够防止未连挂的车辆继续往下跑车的挡车栏。

A.小于 

B.大于 

C.等于

什么情况下采用晶闸管并联？