桥涵工程结构的设计极限状态分为( )。

列举桥涵钢筋工程中所用到的机械设备？

工程图上的尺寸单位标注规定，桥涵工程图以（）为单位。

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.

在修建水库的栏水坝或道路的桥涵等工程时，需要知道栏水坝、桥涵的上游（）的大小，以便计算来水量。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

桥涵附属工程砌体如使用卵石，应选用（）的块体。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。