单项选择题
Survival practice in the mooring system is to slack off the tensions on the leeward side and（）.
A.deballast the unit to transit draft B.adjust as evenly as practical the windward tensions C.release the anchors on the windward side D.tighten the anchor buoys on the leeward side anchors
单项选择题 Steering a motor lifeboat broadside to the sea could cause it to（）.
单项选择题 Severe exposure to chlorine gas can be fatal. Chlorine gas is primarily a（）.
单项选择题 Separation cloths may be used to（）.
