由砖石、毛石、素混凝土、灰土等刚性材料制作的基础称为柔性基础。

由夸石、毛石、素混凝土、灰土等刚性材料制作的基础称为柔性基础。

由砖石、毛石、素混凝土、灰土等刚性材料制作的基础称为柔性基础。

刚性基础一般指钢筋混凝土条形基础，用于柔性基础不适宜时的墙下条形基础或钢筋混凝土柱下条形基础。（）

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。

什么是刚性基础、柔性基础？