混凝土立方体试件抗压强度试验步骤之一有（）并检查其外观。

混凝土抗压强度试验立方体标准试件边长为（）mm，养护龄期为（）天。

混凝土立方体抗压强度试验，可采用任意精度的试验机。

混凝土立方体抗压强度试验用的压力试验机：（）。

下列关于混凝土立方体抗压强度检测试验的说法，正确的有（）。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。