【判断题】汽油机与柴油机比较,汽油机有点火系,而柴油机没有点火系。
【单选题】(6—9题共用题干)
A.
,女,28岁,体温39.5℃, 遵医嘱行灌肠降温。
【单选题】The campers began to make________fire from the dry branches to cook their lunch,which made their tent catch________fire. [ ]
【单选题】The campers____their tent in a sheltered valley.
【简答题】Before it got dark the campers( )( ) their tent in a field
【单选题】燃气涡轮发动机轴承腔封严的空气来自( )。