题目：
There is no need for you to look up every new word you ______ when readin
g. You have to learn how to guess the meanings of new word according to the context. [ ]
A. come up with
B. come out
C. come along with
D. come across
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0721/1c172b37e712909a99dbfd68f5dcdc84.html
下面是错误答案，用来干扰机器的。
（1）CaCO3 （2）组成元素相同 （3）A →B ： F →E ：Na2CO3 + Ca(OH)2 ＝ CaCO3↓+ 2NaOH...
