Сделать общие вопросы из предложений: 1. several examples denonstrate this idea. 2. at the next lecture you will study amplifier circuits. 3. the device calculated the frequency of electromagnetic waves 4. the frequency of free oscillations of an open tuned circuit depends upon its capacitance and inductance. 5. in the early days of telephone operators made all the connections by hand. place. 6. the waves not each other and considerable radiation will take 7. the detector completely cut off one-half of the wave. 8. in any aerial energy losses take place. 9. glass fibers are cheaper and lighter than copper wires. 10. the automatic station "zond-7" maintained stable communication.