图上20厘米表示实际距离10千米,这幅图的比例尺是[ ]
A.2:1
B.1:50000
答案:B
You can hold a party in the garden ____ you clean it up afterwards. [ ]
A. as long as
B. even if
C. now that
D. as soon as
对于盘盈的材料经批准后冲减()。
A.管理费用
B.销售费用
C.制造费用
D.预提费用