影响煤粉质量的六个主要因素是（）、灰份、固定碳、挥发份、热值和细度。
参考答案：水份
In relation to the Companies Act 2006, explain the duty of directors to promote the success of the company, and to whom such a duty is owed. (10 marks)
喷涂可用于修复（）零件。
A.排气阀
B.喷油器
C.电机转子轴
D.曲轴
