【简答题】所谓高级消费形式,主要是就旅游的( )和( )而言。
【单选题】People _____ one another in their potential to sort out problems. [ ]
【单选题】Customs vary greatly _____ country to country. [ ]
【单选题】当测量活塞环自由开口值明显小于新环时说明弹力()。
【简答题】A. imply B. fry C. specify D. vary
【单选题】These three teachers vary __________ their manner of teaching.