沙滩排球诞生于20世纪20年代（）；软式排球20世纪80年代（）

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.

自我掩护进攻包括（）进攻打法。

排球比赛的后排队员进攻，是指后排队员可以到前排扣球。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

排球竞赛规则主要包括哪些内容？

在快球掩护进攻中，主要有：（）、（）、（）、（）或三快进攻、双快一跑动进攻等打法。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。