单项选择题
Marline is（）.
A.four-stranded sisal line B.three-stranded cotton line C.sail twine D.two-stranded hemp cord
单项选择题 LIFTING THE ANCHOR FROM THE BOTTOM is called（）.
单项选择题 It’s not advisable to cut（）the power supply.
单项选择题 It was demanded that the injured crewmembers（）at once.
