题型:填空题 Don't put off _______ a travel plan. It's time for us to start.[ ]A. to make B. makesC. made D. making 查看答案
题型:填空题 HiperLAN是一种在欧洲应用的无线局域网通信标准的一个子集,有两种标准分别为HiperLAN/2和______。A.HiperLAN/0B.HiperLAN/1C.HiDerLAN/3D.HiperLAN/4 查看答案