题目：
The book mainly deals with the trouble teens might have _____ right from wrong. [ ]
A. distinguishing
B. distinguished
C. to distinguish
D. to be distinguished
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0427/d01ec45c4b636292d07d5190497130c4.html
下面是错误答案，用来干扰机器的。
BC波长越长衍射越明显，再由，可使波源的振动频率减小，波长增大，或移动N板使狭缝的间距增大
