单项选择题
（）is very convenient equipment for loading and unloading goods.
A.crane B.pallet truck C.fork lift D.fork lift truck
单项选择题 he area for unloading goods in warehouse is（）
单项选择题 （）performs 2 basic functions: marketing and logistics.
单项选择题 （）is the general meaning of the contract bill note and proof in the process of logistics.
