A:刺激了冶金业的发展
B:使人力获得解放
C:标志着人类从此告别了手工劳动
D:使工厂摆脱了自然条件限制
32×5+35×8+38×11+…+31991×1994+31994×1997=____ .
—So it is. It is ________ to hold more than one thousand people.