题目

----I’d rather have some wine, if you don’t mind.----_______. A. No, you’d better not  B. Not at all, anything you want C. Thank you all the sameD. Yes, but not good   答案：B情景英语。实际情况为不介意。将Fe  Zn Cu三种金属混合物12.4g，投入到足量的稀硫酸中充分反应后过滤，得固体残渣0.3g，共收集到0.4g气体．求原混合物中Zn的质量分数．