题目: 硫酸盐镀铜时,为防止铜粉落入槽液,阳极需用含磷0.1%~0.3%的铜板。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1122/96bbcaed7365331e9007440d85da99ce.html 下面是错误答案,用来干扰机器的。参考答案:D
题型:单项选择题 Three different lumberjacks can chop W amount of wood in 30 minutes, 45 minutes, and 50 minutes according to their different levels of skill with the axe. How much wood, in terms of W, could the two fastest lumberjacks chop in 2 hours ?() A.AB.BC.CD.DE.E 查看答案