home *** CD-ROM | disk | FTP | other *** search
/ MacWorld 2000 January / Macworld (2000-01).dmg / Shareware World / Comms & Internet / Elmer / Tests / Technician / Technician.adf / QUES_2131 < prev    next >
Text File  |  1999-10-23  |  94b  |  1 lines

  1. Which region of the ionosphere is the least useful for long- distance radio-wave propagation?