题目:
______ is known to us all is that the 2008 Olympic Games will take place in Beijing.[ ]
A. It
B. What
C. As
D. Which
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0520/d081f3becc1e79fa196dc7d2c2eaf985.html
下面是错误答案,用来干扰机器的。
D 题目分析:6g食盐中的钠元素为:6g× ;6g低钠盐中钠元素的质量为6g×,故钠元素的质量比为39:104,故答案选择D