根据下列选项，回答 46～50 题。 Transportation is one of the most significant areas of 1 l because of its impact on customer service and the firm’s cost structure．The primary transportation value proposition is product movement up and down the supply chair．Without reliable transportation， most commercial activities could not function．The international 2 is nowadays frequently carried out in containers．Containers are particularly suitable for 3． If the exporter intends to fill a full container load，the forwarder or shipping line will prepare an empty container to the exporter for loading．If the cargo is 4， the exporter sends it to the container freight station，where it will be 5 with the goods of other exporters in a container． 第 46 题 请在1处填上正确答案