下列不是膜片离合器分离不彻底的原因有（） ["膜片弹簧产生变形","踏板自由行程过大","离合器从动盘变形翘曲","从动盘磨损过大"]
The ship’s bearing is 145°（）the lighthouse. ["in","on","from","at"]
脱盐现场有一个隔膜伐打不开，如何检查处理？
All vessels at mooring（）move to the sheltered anchorage. ["must","have to","must be"]
油炉PV-9904阀开不到最大，试分析原因？
油炉PIC-9401输出0％时，现场PV-9401关不到最低位置，你如何检查处理？
