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？
