“天下无桥长此桥”描述的是下列的（）

A.卢沟桥

B.安济桥

C.安平桥

D.赵州桥

Having studied the INMARSAT document, GMDSS document, SOLAS Convention and other international navigation documents, we all know that the Chapter IV of SOLAS Convention is mainly about（）.

A.the radio regulations

B.the technical terms and definitions

C.how to operate the GMDSS SES equipment

D.Maritime Communications