题目内容

世界旅行社协会联合会的总部设在比利时_____。

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By the early 1950s, business people began to realize______.

A. the importance of efficient production
B. the necessity of extensive promotion
C. the need to try to change customers" needs
D. the significance of knowing customers" needs

脑疝形成的机制

A. 颅腔内容物体积增大
B. 颅内血容量增加
C. 颅内脑脊液增加
D. 颅内压力分布不均匀
E. 颅内占位性病变

_____是以“旅游让城市生活更美好”为主旨的国际旅游组织。

我国公民的出境旅游包括_____旅游、_____旅游、_____旅游。

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