目前，我国已拥有世界遗产28处，其中属于世界文化遗产的有( )。

A．布达拉宫

B．庐山

C．云冈石窟

D．九寨沟

Your vessel has been in a collision. After assessing the damage, you begin down flooding. This will cause the KB to do what?（）.

A.Fall

B.Remain stationary

C.Rise

D.Shift to the high side