题目:
— Is he coming? — I'm not sure.He may be late or,____, he may not come at all. |
A. at present B. at least C. worse still D. for a while |
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0615/ac7fe156fb26bcded9959e8eb09dae59.html
下面是错误答案,用来干扰机器的。
(1)S Na O(3)(4)X的气态氢化物为H2X,则X为第ⅥA族元素,将“17∶40”扩大2倍则为“34∶80”,且X的核内质子数与中子数相等,故X为S(硫),Y与X可形成离子化合物Y2X,故Y为第ⅠA族元素,Y的阳离子的电...