网球的基本击球方法有正手击球和反手击球两种。

正手近台快攻击球动作是以上臂和前臂为主向左前上方发力，在来球的下降前期，以垂直拍形击球的中部。

网球的正手击球可演化成击（）。

接发球的击球动作是（）

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.

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。

排球基本技术是指在（），采用的各种合理而有效的各种特定的基本击球动作和配合动作的总称。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。