离心泵型号（IS-150-125-315）的意义？

离心泵型号IS-150-125-315中的IS指的是符合国际标准的单级单吸式离心泵、150指的是（）、125指的是（）、315指的是（）。

我国明清时期，采用科举考试选拔官吏。科举考试中的“解元”指的是（　　）。

Is this（）longer or shorter?

水泵型号20sh——6A中的sh表示单级双吸离心泵。

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.

The （） is used for hauling in or letting out the wires or ropes.

A mark or place at which a vessel comes under obligatory entry，transit，or escort procedure is know as（）.

If you do not know the subject, you will not understand what is said or written, even if English is your mother （） what is said or written.

Damage to cargo caused by fumes or vapors from liquids，gases，or solids is known as（）.

通过分析操作技能形成过程中的动作特点，一般认为操作技能可以分为（）。