盖层的主要岩性有（）。

A.花岗岩、石灰岩、板岩

B.泥岩、膏盐、致密碳酸盐岩

C.变质岩、砂岩、粉砂岩

D.碎屑岩、化学岩、煤

The distress message of a ship should include considerable information which might facilitate the rescue. This information should（）.

A.ALWAYS be included in the initial distress message

B.be sent to a Coast Guard station FIRST

C.be transmitted as a series of short messages，if time allows

D.include the vessel's draft