Шум на улице с уровнем громкости LI1=70 фон слышен в комнате так, как шум с уровнем громкости LI2=40 фон. Найти отношение I1/I2 интенсивностей звуков на улице и в комнате
1 english pupils usually wear uniform,.don't they? 2 russian pupils don't wear school uniform,..do they? 3 we often learn poems by heart,.don't we? 4 my friend reads funny stories,..doesn't he...? 5 our teacher speaks english very well,...doesn't she...? 6 the student doesn't tell the truth,.does she? 7 the head teacher invited us to britain,..didn't she? 8 you had an interesting programme,..didn't you? 9 tim did not see his friend last week,..did he? 10 the family did not stay in the hotel,...did they..? 11 we studed two foreign languages,...didn't we...? 12 the teacher proposed to do the task,..didn't she? Составьте и перевидите предложения! A group of six pupils take part the in the local tennis competition. Группа из шести учеников принимает участие в местных соревнованиях по теннису. We arrange a picnic on Monday. Мы организуем пикник в понедельник.
1 english pupils usually wear uniform,.don't they? 2 russian pupils don't wear school uniform,..do they? 3 we often learn poems by heart,.don't we? 4 my friend reads funny stories,..doesn't he...? 5 our teacher speaks english very well,...doesn't she...? 6 the student doesn't tell the truth,.does she? 7 the head teacher invited us to britain,..didn't she? 8 you had an interesting programme,..didn't you? 9 tim did not see his friend last week,..did he? 10 the family did not stay in the hotel,...did they..? 11 we studed two foreign languages,...didn't we...? 12 the teacher proposed to do the task,..didn't she? Составьте и перевидите предложения! A group of six pupils take part the in the local tennis competition. Группа из шести учеников принимает участие в местных соревнованиях по теннису. We arrange a picnic on Monday. Мы организуем пикник в понедельник.
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