焊接电弧的阳极区和阴极区的温度主要取决于（）与焊接电流的乘积
参考答案：电弧电压
The _________ hunter has many interesting ________.
A．experience; experiences
B．experienced; experience
C．experienced; experiences
D．experiences; experienced
热力循环中郎肯循环效率最高。（）
