"In Admiralty Notices to Mariners, Section IB, Current Hydrographic Publications will be published ___times every year.
A.12
B.2
C.4
D.about 52"
正确答案是C
"In Admiralty Notices to Mariners, Section IB, Current Hydrographic Publications will be published ___times every year.
A.12
B.2
C.4
D.about 52"
正确答案是C