单项选择题
Travel medicine in Britain is()
A.not something anyone wants to run. B.the responsibility of the government. C.administered by private doctors. D.handled adequately by travel agents.
单项选择题 下列各项,适用采取“补法”的是()
单项选择题 从现有资料看,“旅游”一词最早出现在()
单项选择题 流通仓库、工厂仓库的生产效率在很大程度上依赖于收发货物的()。