设a=3k,b=7k,
则ab-a=3k7k-3k=3k4k=34,
故答案为:34.
We have __________ money to buy the nice coat.[ ]
A. few
B. enough
C. many
D. much too
出料加工项下的出口料件,免于缴纳出口关税;加工后成品复进口时,海关对其加工增值部分予以征税。( )