问题: Accordingtothesecondandthirdparagraphs,whatistrueofgraphene?
A: Itcanbeusedtomakepaper.
B:Itispossibletoseeitwithournakedeye.
C:Itiseasytofindgraphene.
D:Itispossiblythethickestmaterialintheworld.
微信扫码获取一对一帮助