某患者长期住院，只靠静脉给养，血清检出二十碳三烯酸与花生四烯的比值为0.5，最可能缺乏的营养素是（）

试述住院医师规范化培训的培训对象、培训年限及培训内容。

系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。

Shutdown price（or point，or rule） 停业价格（或停业点、停业原则）

翻译：With Average or With Particular Average（WA or WPA）（）

（）是一种骨营养不良性疾病，常在成年动物软骨内骨化完成后发生.

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

白肌病是由于微量元素（）缺乏引起的营养代谢性疾病。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。