拔牙后压迫创口的纱布应于________吐出：()
A．5 min后
B．10 min后
C．30～60 min
D．当天
参考答案：C
It was not what you said but ________ you did ________ made me angry.[ ]
A. why; what
B. what; that
C. that; which
D. how; what
内燃机的配气定时和作用？
