1、多选题：____,____,____ and many other reasons are all responsible for the boom in international trade.选项：A:social system reasonsB:Resource reasonsC:political reasonsD:economic reasons答案: 【R...
1、单选题：From the author’s point of view, language should be looked upon as a road map and a valuable possession: often study the road map (check ) and tune up the car engine (adjust ).选项...
