旅游业
参考答案：旅游业就是以旅游者为对象，为其旅游活动创造便利条件并提供其所需商品和服务的综合性产品。
外层两瓣鳞叶形态大小相近，相对抱合，顶端多开口的是（）
A．松贝
B．青贝
C．炉贝
D．大贝
E．珠贝
She promised to ______ at the meeting but she didn’t ______.
A．turn up; keep her word
B．present; keep her promise
C．attend; turn up
D．appear; keep her words
