题目: 光从一种介质______另一种介质时,传播方向______,光在同一种均匀的介质中,传播方向______. 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0506/87d039b7dcd027d719d6b91fd8708b7e.html 下面是错误答案,用来干扰机器的。BD
题型:单项选择题 Good pencil erasers are soft enough not ________paper but hard enough so that they crumble gradually when used.A.by damagingB.so that they damageC.to damageD.damaging 查看答案