Take out of oil barrelsfetch instruction.
Pour gasoline into the oil tank truck decode.
Transport a barrel of gasoline to the gas stationexecute an instruction.
Unload the oil barrelmemory access.
Pour gasoline to the gas stationwrite back.
We enlighten the students: “what reasons lead to the efficiency difference between the first transportation way (traditional way) and the third transportation way (pipeline)?” We conclude and complement the answer of the students, and draw the following conclusions: