下列关于统计抽样与非统计抽样的说法中，错误的是（）。

口服补液及时纠正脱水，应用ORS，说法正确的是（）

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。

关于部门统计工作，下列说法中错误的是（）。

下列关于统计抽样与非统计抽样方法的说法中，错误的是（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下列关于β系数和标准差的说法中，正确的有（　　）。