弧长缩短时，焊接电弧静特性曲线将（）。

手工电弧焊时，直径相同的酸性焊条焊接时弧长要比碱性焊条长些。

焊接过程中，焊机的负载总是在不断地变化着，焊接过程中（）能引起弧长的变化甚至短路等。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

埋弧焊焊接电压与电弧长度成（），电压增高弧长增加；电压降低弧长缩短。

电渣压焊焊接直径14mm的钢筋时的电弧过程电压范围是（）。

手工电弧焊的焊接工艺参数主要包括（）、（）、电弧电压、焊接速度和焊接角度等。

焊接时缩短焊接电弧，电弧电压就会（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。