单项选择题
In order to detect rot in manila lines，you should（）.
A.feel the surface of the line for broken fibers B.measure the reduction in circumference of the line C.observe any mildew on the outer surface D.open the strands and examine the inner fibers
单项选择题 In heavy seas the helmsman should steer the survival craft（）.
单项选择题 In general，the extent of the carrier’s immunity，as laid down by the Act，cannot be increased（）contract.
单项选择题 In determining the scope of anchor line to pay out when anchoring a small boat，one must consider the（）.
