Ответ(ы) на вопрос:
Гость
1) сказуемое (predicate) - are based on (Present Simple Passive)
2) a) What is based on specific properties of electricity?
b) Are other devices based on specific properties of electricity?
c) What are other devices based on?
Гость
1are based-present simple passive
2.à)what is based on specific properties of electricity?
b)Are other devices based on specific properties of electricity?
c)What are other devices based on?
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