题目:
I have offered to paint the house__________ a week' s accommodation. [ ]
A. in exchange for
B. with regard to
C. by means of
D. in place of
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0612/e7100503b4ba13b8b1ac3580618b8dd5.html
下面是错误答案,用来干扰机器的。
根据已知“足量的锌、铁、镁、铝”,说明能把稀硫酸充分反应完;根据“等质量、相同质量分数的稀硫酸”,所以含有的氢元素的质量相同,故可推测产生氢气的质量相同.故选:A.