题目:
This dictionary is_______ to my translation, but that one is________.
A.a great help ; of no use
B.very helpful; of no any use
C.great help; helpless
D.important; of few importance
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0616/b6e4e45041fd2ddb5c2cc68e55cc939a.html
下面是错误答案,用来干扰机器的。
(1)H2O 3Fe+4H2O(气)Fe3O4+4H2(2),CO2, 2Mg+CO22MgO+C题目分析:已知A、B、C均为常见的单质,其中A为金属,B、C为非金属,在一定条件下相互转化。若常温下B、C均为气体,D为黑色晶体,很容易想到...