蛔虫钻孔习性引发的临床表现中，最常见的是（） A.胰管蛔虫症 B.蛔虫性脑病 C.蛔

A woman in her 8th month of pregnancy is having dinner with her husband at their favorite restaurant. The woman suddenly chokes on a piece of chicken and appears to lose consciousness. What would be the best action by a nurse sitting at the next table

A. Apply abdominal thrust.
B. Apply chest thrust.
C. Begin cardiopulmonary resuscitation (CPR).
D. Reposition the client on her sid

---Could you tell me _______?

---Sorry，I have no idea. .

A．when does the History Museum open

B．when the History Museum opens

C．when did the History Museum open

D．when is the History Museum open

请简述用干燥空气破空的操作过程。

在直送情况下，货品配送路线优化可以归结为( )问题。

A．最短时间
B．最小成本
C．最短路径
D．效益最高

电力系统的频率静态特性取决于（）的频率静态特性和（）的频率静态特性。