Complete as in the example. A: Is it a classroom? B: No, it isn’t. It ’s a school 2 A: Are they pens? B: Yes, they are.

Question

Другие предметы: Complete as in the example. A: Is it a classroom? B: No, it isn’t. It ’s a school 2 A: Are they pens? B: Yes, they are.

тик12345 · Answer

1)Когда колеблются с частотой от 20 до 20000 Гц2)Колеблющихся3)Частотой...