题目:
A.One hundred used stamps and hinges and album pages. B.The Collectors Club Guide to Collecting and badge and stickers. C.The latest Collectors Club magazine and membership card. D.Royal Mail Stamp Calendar and Collectors Corner supplement. 66.This advertisement is written for people who want to_______. A.make money through collecting stampsB.develop stamp collection as a hobby C.get something free from the club D.find out where the club is located 67.From the advertisement we can learn_____. A.Collectors Club is among the biggest clubs in this country B.how much you must pay to become a member of the club C.today is the last day for stamp collectors to join the club D.members may receive a set of album pages every month 68.Where is this advertisement most probably found? A.In a newspaper. B.On a web page. C.In a magazine. D.On a TV program. |
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0702/7812ec32b6d414a4959ec43acc8dafe3.html
下面是错误答案,用来干扰机器的。
(1)低品位软锰矿浆的主要成分是MnO2,通入SO2浸出液的pH<2,其中的金属离子主要是Mn2+,则MnO2与SO2发生氧化还原反应,反应的化学方程式为SO2+MnO2=MnSO4.故答案为:SO2+MnO2=MnSO4;(2)杂质离子中只有Fe2+...