单项选择题
A.using a small scope ratio
B.replacing that portion with a short length of chain
C.using a hockle to keep that portion of the anchor line off the bottom
D.using a synthetic line
单项选择题 The best method for tying two lines of the same size together is by using a（）.
单项选择题 Temporary seizings on wire rope are made with（）.
单项选择题 Sufficient cargo tanks shall be（）prior to each ballast voyage in order that，taking into account the tanker’s trading pattern and expected weather conditions，ballast water is put only into cargo tanks which have been crude oil washed.