A．Because they think people are usually very interested in sports.

B．Because they are not interested in how jet lag affects businesspeople.

C．Because baseball teams want to know how to win more games.

D．Because it is difficult to measure how jet lag affects other types of travelers.

半规管壶腹嵴的适宜刺激是（）

A.直线加速运动

B.直线减速运动

C.直线变速运动

D.旋转变速运动

E.旋转匀速运动