采用成形法铣削齿轮,适用于任何批量齿轮的生产。
参考答案:错
If it _________ not for all the cars and passers-by with cameras, you _________ think you have magically traveled back to the 14 century.
A.is …will
B.had been… would
C.were… will
D.were…might
报账制单位的下列经费由基层预算单位按年核定,由报账制单位包干使用,并实行超支不补,结余按比例留用的管理办法()。
A.办公费
B.水电费
C.办公设备购置费
D.物业管理费
E.图书资料购置费