工具钳工常用的手用锯条,其长度为()。 ["250mm","300mm","400mm","800mm"]
据《灵枢•师传》,肠中热则() ["出黄如糜","消谷","令人悬心善饥","腹胀","脐以下皮寒"]
使用弯螺杆钻具钻进中泵压突然上升应()。 ["停泵","停转盘","上提钻具","继续加压"]
据《素问•五藏别论》,五气入鼻,藏于() ["心","肝","脾","肺","肾"]
有油气作业管道和污水设备的地方很容易存有硫化氢气体,化学名H2S它是一种可致命剧毒气体。以下描述错误的是() ["A、剧毒、仅次于氰化氢,毒性高过一氧化碳5-6倍","B、无色透明。","C、恶臭味、类似臭鸡蛋气味。但高浓度下是无味的","D、施工中硫化氢可以依靠气味识别"]
折返站道岔故障时,车站人工办理进路,司机凭()进出折返线。