用酸度计以浓度直读法测试液的pH，先用与试液pH相近的标准溶液（）。

工业循环冷却水中钙离子的测定中，加入的氨--氯化铵缓冲溶液的PH值约为（）。

PS版润版液的PH值约在（）。

PS版空白部分的表面能—润湿液的表面自由能。（）

平版印刷版面空白处需要润版液保护。

胃液的pH值约为（）

《印刷概论》教材，其正文的文字排版，采用的字体是（）字。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。