当水流的流线为相互平行的直线时，该水流称为（）。

A.均匀流

B.恒定流

C.非均匀流

D.非恒定流

— There will be             people in Beijing than usual because of all the visitors to the Olympics. 

— Right. We Chinese should feel proud of the Olympics and try our best to help! [ ]

A. many

B. more

C. most