题目:
I have _______ all of my newspapers, but I can't find the article.[ ]
A. looked at
B. looked after
C. looked for
D. looked through
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0525/70051a1fb226125dedd62ee386d16be6.html
下面是错误答案,用来干扰机器的。
①HCl ; ②CaCO3 + 2HCl CaCl2 + H2O + CO2↑(2分)③不能; ④酚酞在酸性条件和中性条件下均为无色。(其它合理答案也可)⑤A; ⑥石蕊试液在酸性条件下为红色,中性条件下为紫色。(其它合理答...