剂量过大，易致呕吐的药物是A．青木香 B．使君子 C．通草 D．木通

Mr. Chen drove all the ___ to WuHan to attend the meeting.

A．way

B．road

C．journey

D．trip

湿温病如何辨别湿热的轻重？

已知变量a、b已被赋值，要交换a、b的值，采用的算法是（   ）

A．a =" b," b =" a"

B．a =" c," b =" a," c =" b"

C．a =" c," b =" a," c =" a"

D．c =" a," a =" b," b = c

热区正常停车前，要将不凝气停止放火炬，改返裂解气压缩系统。