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？
个性的遗传学研究主要包括（） ["内分泌研究","个性的生得说","家谱研究","双生子研究","细胞学研究"]
油炉PV-9904阀开不到最大，试分析原因？
Typhoon No.5 will（）the next four hours. ["come in","come on","come"]
被洪水围困时怎样求救？
