在其他条件相同时，横波声束的指向性比纵波好，横波的能量更集中一些，因横波波波长比纵波短。

地震波有体波和面波两种，体波又分为横波（S波）和纵波（P波），其中能造成较大损害的是纵波（P波）。

超声波波型有纵波和（）两类，用L表示纵波，（）表示横波。

超声波波型有（）和横波两类，用（）表示纵波，T表示横波。

平面纵波波速比平面横波波速（）。

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。