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Disjunctive questions:

1. Radio is the transmission of signals through space by modulation of electromagnetic waves, isn't it?

2. A radio-wave passes through the vacuum, doesn't it?

3. Radio system consists essentially of transmitter and receiver, doesn't it?

4. The received data is processed electronically, isn't it?

Alternative questions:

1. Was radio invented by Edison or (by) Popov?

2. Will the data obtained be processed by the system or not?

3. Is the received data processed electronically or not?
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1. Radio is the transmission of signals through space by modulation of electromagnetic waves, isn't it?

2. A radio wave passes through a vacuum, doesn't it?

3. A radio system consists essentially of a transmitter and a receiver, doesn't it?

4. The received data is processed electronically, isn't it?

1. Was radio invented by Edison or (by) Popov?

2. Will the data obtained be processed by the system or not?

3. Is the received data processed electronically or not?
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thanks