柴油机空气滤芯脏，进气量不足，可能导致排气冒（）。

A.黑烟

B.白烟

C.蓝烟

D.灰白烟

A MARK OR POSITION AT WHICH A VESSEL IS REQUIRED TO REPORT TO ESTABLISH ITS POSITION defines（）.

A.VTS point

B.Way point

C.Reference point

D.Establishment point