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【简答题】

You are now the proud owner of the AF Zoom-Nikkor, a lens that will provide you with years of exciting picture-taking opportunities. Before using this lens, please read these instructions and the notes on safety operations in your camera’s instruction manual. Also, keep this manual handy for future reference. 注:AF Zoom-Nikkor: AF变焦镜头—尼克尔 lens:镜头

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【单选题】1942年,瑞士学者汉泽克尔和克拉普夫对旅游的定义被( )所利用

A.
旅游科学专家联合
B.
世界旅游组织
C.
旅游理事会
D.
联合国“官方旅游机构国际联合会”