Travel and tourism have grown from an activity limited to the privileged rich into its present day industry having major _________ significance.
A、social and technical
B、social and economic
C、economic and technical
D、social and political
【正确答案】：B
【题目解析】：(P189)旅行和旅游业已从一种仅限于贵族阶层才能从事的活动项目发展成为一种目前具有很大社会和经济意义的行业形式。
