口服补液及时纠正脱水，应用ORS，说法正确的是（）

可以在（）阶段采用Make-or-buy决策分析。

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.

实验室制取氯气不用排水集气法收集，因氯气能溶于水，但可以用排饱和食盐水收集。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

工业上获取丁二烯的主要方法有：从烃类裂解制乙烯的联产物碳四馏分分离得到、由（）催化脱氢法制取和丁烯氧化脱氢法制取三种。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下列哪些药材可以用微量升华法鉴别（　　）。