简述砂土液化机制？如何用标贯试验判别砂土液化？

松散砂土产生液化的机理是什么？防止砂土液化的主要方法是什么？

系统中雷达状态包括Unknown、Operational（or ON）、Failed（or OFF）、Detached。

Shutdown price（or point，or rule） 停业价格（或停业点、停业原则）

翻译：With Average or With Particular Average（WA or WPA）（）

简述布尔算符（OR）的作用。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

按照《公路工程抗震设计规范》（JTJ044―1989）进行液化判别时考虑了地震剪应力比，（）与地震剪应力比有关。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。