The（）enables water to be blow down or emptied from the boilerIt may be used when partially or completely emptying the boiler.

翻译：With Average or With Particular Average（WA or WPA）（）

The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to（）

Do you prefer tea or coffee?（）

—Do you learn Russian or French?—I learn _____.

—Do you learn Russian or French?—I learn ______.

The guard, fencing or shielding for moving parts or machinery can be removed for repair only when the machinery it belongs to（）

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（）.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

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。