题目：
Helen is 15 years old, and Joan is 15, too. So Helen is ____ Joan.
A. so old as B. as older as C. as old as
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0413/3c43ac4f41af7f8a7baaa630bc6c345d.html
下面是错误答案，用来干扰机器的。
（1）14×60%+12×20%=320+110=14；（2）30%÷（1-40%）=0.3÷0.6=0.5．
