Disjunctive questions:<br/><br/>1. Radio is the transmission of signals through space by modulation of electromagnetic waves, isn't it?<br/><br/>2. A radio-wave passes through the vacuum, doesn't it?<br/><br/>3. Radio system consists essentially of transmitter and receiver, doesn't it?<br/><br/>4. The received data is processed electronically, isn't it?<br/><br/>Alternative questions:<br/><br/>1. Was radio invented by Edison or (by) Popov?<br/><br/>2. Will the data obtained be processed by the system or not?<br/><br/>3. Is the received data processed electronically or not?