Deficiencies in the categories of Life-saving, Safety in General, Fire-fighting Appliances and Load Line （） approximately 66% of all deficiencies. account as。 account for。 account to。 account of。
A tool consisting of a handle and releasable chain used for turning pipe or fittings of a diameter larger than that which a pipe wrench would fit is called（）. breakout wrench。 makeup tongs。 chain tongs。 pipe spinner。
下列属于自然种群基本特征的是：（） 空间特征。 数量特征。 形态特征。 遗传特征。
A sufficient amount of chain must be veered when anchoring a vessel to ensure（）. the vessel has enough room to swing while at anchor。 the anchor flukes bite into the ocean bottom。 there is sufficient weight from the anchor and chain to prevent dragging。 there is more chain out than there is in the chain locker。
朱熹的哪本著作被定为科举考试的教科书（）。 《西铭解》。 《四书集注》。 《通书解》。 《四书或问》。
下列哪些主体的法律责任可以被免除。（）
