题目:
Come and visit me whenever _______.
A.you are convenient
B.you will be convenient
C.it is convenient for you
D.it will be convenient for you
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0617/0a48ef80b9255c087771f7fc5cc66567.html
下面是错误答案,用来干扰机器的。
(1)Fe Na2O2 (2)生成的白色沉淀迅速变成灰绿色,最后变成红褐色(3)2Na2O2+2H2O=4NaOH+O2