滚球（Roll Ball）最多不能向后滚超出（）米。

万方数据库使用布尔逻辑算符anD./or/not.其中A.anD.B表示（）。

传20米以内地滚球最适宜使用（）

石方挖方边坡，20米以内的坡率一般为（）。

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.

一般要求站点周围（）米以内不能有超出本楼5米以上的楼，（）米以内不能有比较宽大的高楼。

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。