正压式空气呼吸器警报器报警压力为()MPa。
A、1、4~1、6
B、0、4~0、6
C、8
D、4~6
参考答案:D
从1~19这19张数字卡片中任意摸出一张,卡片上的数是奇数的可能性是______,是质数的可能性是______.
I'd like to arrive 20 minutes early ____ I can have time for a cup of tea. [ ]
A. as soon as
B. as a result
C. in case
D. so that