您还有0次抽奖机会
锤子
消耗积分 : 免积分
Above image is a copper sample coated with nickel and gold. Since nickel and copper have similar atomic number, it is hard to differentiate the boundary between the two. Through chemical etching, as shown in the right image, two layers can be easily distinguished. If etching is impossible, layers can be distinguished in the BSE mode.
打开失败或需在电脑查看,请在电脑上的资料中心栏目,点击"我的下载"。建议使用手机自带浏览器。