微束等离子弧焊接一般要求垂直下降外特性的整流电源。( )
参考答案：对
入夏时常发热，肌肤灼热，汗少，食少，倦怠无力，证属于 （）
A.中暑
B.中暑热
C.中暑湿
D.暑湿困表
E.湿滞经络
In relation to the management and administration of companies:
(a) Explain the roles of the external auditor and the internal audit commission. (5 marks)
