污水管道在图上标注时，常用汉语拼音字母（）表示。

煤气管道与电气导线之间的距离，同一平面间距应大于（）；不同平面间距应大于等于（）。

作为填土工程的土料，压实效果与不均匀系数Cu的关系：()

选择正确答案填在括号内（）。

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.

分辨语句中“发”字的用法（将对应当答案编号填入括号内）：当春乃发生（）

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。