简述硅铁生产的特点？
参考答案：⑴、矿热炉连续式⑵、无渣法冶炼⑶、埋弧操作⑷、低电压大电流⑸、能耗高
In my opinion , the thief is likely to come , please look _____ for him .
A．up
B．after
C．out
D．down
地震是什么？
