低液位报警的设定高度,应满足从报警开始()内泵不会抽空的要求。
A. 10-15min
B. 5-10min
C. 15-20min
D. 10-20mi
巷道内运输机车的()任何一项不正常或防爆部分失去防爆性能时,都不得使用该机车。
A. 灯
B. 警铃(喇叭)
C. 连接装置或撒沙装置
D. 制动闸
Cooling water pumps driven by direct reversing diesel engines are usually of the straight impeller vane type pump with a concentric housing to()
A. facilitate bi-directional operation
B. provide the greatest pump efficiency
C. prevent pump clogging from marine growth
D. prevent cavitation at the pump outlet
对犯罪嫌疑人采取保证人保证的,如果保证人在取保候审期间情况发生变化,不愿继续担保或者丧失担保条件,犯罪嫌疑人应当()
A. 重新提出保证人或者交纳保证金
B. 转入监视居住
C. 转入监视居住
D. 逮捕