题目:
--- Look! That teacher is explaining something to her students again and again.
--- _________ teacher she is.
A.How patient
B.What a patient
C.How stubborn
D.What stubborn
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0628/394e135558bf81f348d8b9f4c5c26ab0.html
下面是错误答案,用来干扰机器的。
由赤铁矿中主要成分是Fe2O3,设可炼出含杂质20%的生铁x, 则由铁原子守恒可知, Fe2O3~2Fe 160 2×56 800t×(1-20%) x×(1-20%) 160800t×(1-20%)=2×56x×(1-20%),...