焊接电源线确需使用长导线时，必须将其架高距地面2.5m以上并尽可能沿墙布设，并在焊机近旁加设（）。
参考答案：专用开关
The manager of the company asked ________.
A．What is the hero’s name.
B．what the hero’s name was
C．What was the hero’s name.
D．what the hero’s name is
既可麸炒又可炒焦的药物是（）
A.水蛭
B.枳壳
C.苍术
D.山药
E.麦芽
