常用布尔算符有：and、or、not等，当采用同义词进行检索时应当选用的算符是？

1948年12月1日，中国人民银行在石家庄宣布成立，合并组成它的银行是（）

可以在（）阶段采用Make-or-buy决策分析。

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。

简述我国大学生社会直接成本分析的常用方法。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

铁道工程中常用的天然石材有哪些？