题目: 局部通风 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/1118/40c7e08c5d6421d3de670366023022c0.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:选择题 ________ the professor did all he could to help, the experience failed eventually.[ ]A. Since B. When C. While D. As 查看答案