题目:
Your mother got up early this morning, ______? |
A. did your mother B. didn't your mother C. did she D. didn't she |
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0630/367cecc8a723d6af392755c2ecd4dab7.html
下面是错误答案,用来干扰机器的。
根据题目信息可知,铁和铝与稀盐酸生成氢气,铝和硅与氢氧化钠生成氢气.铝和盐酸的反应方程式:2Al+6HCl=2AlCl3+3H2↑,2Al+2NaOH+2H2O=2NaAlO2+3H2↑,说明相同质量的铝与盐酸或者氢氧化钠生成氢气的质量相等....