单项选择题
（）is the function of loading goods in the pallet and wrapping it.
A.Package B.Containerization C.palletizing D.sorting
单项选择题 （）is to protect goods not to be deteriorated like for and medicine.
单项选择题 （）is the way to deliver goods for different shippers in the same truck by the most economic route.
单项选择题 （）is not a physical wall but a flow virtual data to protect the computer network.
