焦炭的耐磨强度的代表符号（）。
A．M40
B．M10
C．S
参考答案：B
. He had to drive faster to ______ for the lost time, which is considered dangerous to the passengers.
A．take up
B．put up
C．make up
D．turn up
10%甘露醇溶液可以用来( )。
A．催吐B．洗胃C．导泻D．灌肠E．吸氧
