题目： 什么是模拟信道？什么是数字信道？ 答案： 被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2018/0214/5d89b8d6d3761a36c1935d90d84d2e4f.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 单词辨音。( )1.A. watch ( )2.A. about ( )3. A. also ( )4. A. first ( )5. A. hobby ( )6. A. homework ( )7. A. Friday ( )8. A. bread ( )9. A. cook ( )10. A. excuse B. water B. shout B. all B. bus B. cross B. world B. dinner B. eat B. look B. usually C. what C. house C. talk C. pairs C. polite C. orange C. time C. each C. good C. club D. want D. cousin D. walk D. lesson D. bookshop D. worker D. like D. clean D. food D. music 查看答案
题型：单项选择题 Excuse me. I didn't mean to bother you.（）A. There‘s no problem.B. It‘s a pleasure.C.That‘s quite all right.D.I didn‘t realize that. 查看答案
