本人即将赴UNSW，听朋友说澳洲的教材不便宜，想问问各位学长，下面这些课是否需要买教材，在国内能买到便宜的教材么？期望能得到学长们的帮助！•ELEC3104 Digital Signal Processing •ELEC4601 Digital & Embedded Syst Design •ELEC4602 Microelectronic Design & Tech •ELEC4612 Power System Analysis •ELEC4613 Electrical Drive Systems •ELEC4631 Cont - Time Control Sys Design •PHTN4661 Optical Circuits and Fibres •PHTN4662 Photonic Networks •TELE3118 Network Technologies•TELE4652 Mobile & Satellite Comm System