规程规定：矿车连接装置至少（）年进行一次（）倍于最大静荷重的拉力试验。
参考答案：两；两
There was a big forest fire last week, but nobody knows how it .
A．took place
B．turned up
C．broke out
D．broke up
示范和指导他人，利用网络和公众媒体采集劳动力市场供求信息步骤
