假想用一剖切平面将机件全部剖切，以图形对称中心线为界，一半画成视图，另一半画成剖视图，这样得到的剖视图叫（）。

断面图是假想用一剖切形体,画出剖切面切到部分的图形和末剖切到面可见部分的图形。(  )

断面图是假想用一剖切形体,画出剖切面切到部分的图形和末剖切到面可见部分的图形。(   )

断面图是假想用一剖切形体,画出剖切面切到部分的图形和末剖切到面可见部分的图形。( )

建筑平面图是假想用一水平的剖切平面沿看房屋门窗口以下的位置将房屋剖开,拿掉上部分,对剖切以下部分所做出的水平投影图。( )

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。