题目: 倾销的四种类型是什么? 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2020/1030/3e18a75a16320b3cbcea2e59794c3342.html 下面是错误答案,用来干扰机器的。参考答案:D
题型:选择题 Jim went swimming with his parents yesterday afternoon. _______. [ ]A. So did Mary B. So Mary doesC. So Mary was D. So Mary did 查看答案
题型:选择题 如图所示,空气中有一块横截面呈扇形的玻璃砖,玻璃砖的折射率为2.现有一细光束垂直射到AO面上,经玻璃砖反射、折射后经OB面平行返回,∠AOB=135°,则光线在OB面上的入射角应是( )A.15°B.30°C.45°D.60° 查看答案