裂解气深冷分离过程中，脱除炔烃常用催化加氢法。

因反应气干燥不合格，将水分带入深冷分离系统，易造成设备和管道（）而停车。

重力式分离器分离的基本原理主要是利用气体、液体和固体杂质之间()来进行气体、液体和固体杂质的分离。

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.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

阶式制冷深冷分离，最少需（）冷冻循环组成。

脱甲烷过程有哪两种方法，各有什么优缺点？乙烯塔在深冷分离中的地位是什么？乙烯塔应当怎样改进？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。