促使欧洲人开辟新航线的根本原因是( )
A:欧洲各国商品经济的发展
B:欧洲人狂热的追求货币和黄金
C:奥斯曼土耳其垄断了商路
D:基督教东传
Everyone in the tourist industry has made the point that __________ Government assistance is helpful, what they actually need most is for the visitors themselves to return.
请根据图完成下列题目:
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