复式记账凭证是根据复式记账法的原理填制,而单式记账凭证是根据单式记账法的原理填制( )
参考答案:错
—Who often helps you with your English?
—Mike ______. [ ]
A. be
B. do
C. does
D. go have
何首乌主含
A.黄酮
B.番泻苷
C.土大黄苷
D.二苯乙烯苷
E.香豆素