图 电子信息时代材料消耗 1997: 12 cm2 of Si made per person 2012: 70cm2 of Si per person world-wide! 材料科学与工程学院 10 School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering 1997: 12 cm² of Si made per person 2012: 70cm² of Si per person world-wide! 电子信息时代材料消耗 10