简述如何开展抄核收质量分析?
参考答案:
(1)抄表;
(2)核算;
(3)收费;
Could you tell me _____ the bike without any help this morning?
A.how does he mend
B.how he mended
C.how he mends
D.how did he mend
喷吹煤粉可以代替一部分焦炭,从而降低焦比。