在图中作出沉在杯底的铁球所受力的示意图。
—Did you enjoy your journey to the town?
— _______. We had driven more than 3 hours before we found the right way.
A.Absolutely
B.No way
C.Not at all
D.Quiet a lot
热轧原料为3.5mm×1270mm,冷轧成品为1.0mm×1250mm,不计宽展,求压下率为多少?