下列设备中，具有自吸能力的是（）。

离心泵具有自吸能力。

往复泵具有一定的自吸能力。

采用（）流道的旋涡泵不具有自吸能力。

螺杆泵吸人性能好，具有自吸能力。

下列泵中不具备自吸能力的是（）。

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.

螺杆泵在实际工作中漏泄很少，自吸能力较强。

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。