Radio waves ______ by the ionosphere. This makes it possible ______ short-wave radio signals over great distances.
is reflected / to send
are reflecting / sent
are reflected / sending
are reflected / to send
is reflected / to send
are reflecting / sent
are reflected / sending
are reflected / to send
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Ответ:
1. are reflected
2. to send
Ответ:
Radio waves are reflected by the ionosphere. This makes it possible to send short-wave radio signals over great distances.