施工现场钢结构的连接应优先采用（）。

在房屋结构施工图中，构件与代号对应正确的有（）。

钢结构的连接通常有焊接连接、螺栓连接和（）

钢结构的连接通常有（）三种方式。在房屋结构中，常用（）连接。

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。

按房屋建筑的结构分，可划分为（）、（）、（）钢结构的房屋建筑。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。