According to gravity models, the number of trips produced in zone i and attracted to zone j depends on A: Total number of trips produced in zone i B: Total number of trips attracted to zone j C: Total number of trips produced in zone j D: Total number of trips attracted to zone i

TRIPS协议原则：（）

It’s okay to laugh if someone trips or burps.

TRIPS协议保护的知识产权包括

The purpose of the three advertisements is to provide tourists with ______. A: facts about beautiful places B: information of their trips C: necessary warnings and cautions D: instructions on how to take trips

以下哪些不属于TRIPS协定的基本原则？

She was tired of continual trips to the grocery, school and office.

Business trips don't have to be all business.

Which of the following factors will lead to an increase in the number of trips produced in zone i and attracted to zone j? A: Total number of trips produced in zone i B: Total number of trips attracted to zone j C: Impedance to travel between zones i and j D: The friction factor between zones i and j

To encourage consumers to travel by train，DDB Needham emphasized ______ . A: the freedom and convenience provided on trains B: the practical aspests of travel C: the adventurous aspects of train trips D: the safety and cleanliness of train trips