К магнитной стрелке (северный полюс затемнён, см. рисунок), которая может поворачиваться вокруг вертикальной оси, перпендикулярной плоскости чертежа, поднесли
Are Nick and Peter brothers? Yes, they are. Is Peter nine? Yes, it is. Is Nick nine, too? I guess, yes. Are Nick and Peter from London? No, they are not. Are Peter and Nick singers? Yes, they are
Is Peter nine? Yes, it is.
Is Nick nine, too? I guess, yes.
Are Nick and Peter from London? No, they are not.
Are Peter and Nick singers? Yes, they are