试说明OR DX，-35[BX][DI]指令中源操作数和目的操作数使用的寻址方式。

自然循环热水供暖系统是靠水密度差形成的（）使水在系统中循环的。

水在4oC时密度最大。

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。

焊接时应尽量作到（），以提高焊接质量。焊接高压管道的焊工应经焊强考试合格。才允许进行焊接操作。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

水在室温下的密度可视为（）g/cm3