单项选择题
（）is the function of loading goods in pallet and wrapping it.
A.package B.Containerization C.palletizing D.sorting
单项选择题 （）is used to protect goods not to be deteriorated like food 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 lot of virtual data to protect the computer network.
