在步进电机的步距角一定的情况下，步进电机的转速与（）成正比。

由于步进电机的运行拍数不同，所以一台步进电机可以有（）个步距角。

步距角小的步进电动机，其精度较高。

什么是步进电动机的步距角？什么是单三拍通电方式？

对一台确定的步进电动机而言，其步距角决定于_________。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。