【简答题】四个16Ω的电阻并电阻为( )Ω,四个16Ω电阻串电阻为( )Ω。
【单选题】What was the advice the old man gave to his son?
A.
To pick up the grain that was dropped on the ground.
B.
To plough up the land under his roof.
C.
To plough up the lane in front of his house.
D.
To plough up the long field where there might be grain.
【单选题】发包方提出变更,由( )确认后生效,承包方提出变更,由( )确认后生效
【简答题】甲乙两人打靶,用A表示甲中靶的事件,B表示乙中靶的事件,只有甲中靶表示为____________。
【简答题】甲乙两人打靶,用A表示甲中靶的事件,B表示乙中靶的事件,靶被射中表示为____________。
【简答题】甲乙两人打靶,用A表示甲中靶的事件,B表示乙中靶的事件,甲乙均中靶表示为____________。