к куску железа массой 200 г привязали пробковый поплавок . Какой минимальный обьем пробки понадобится чтобы он не упал на дно?плотность пробки 150кг/м^3

 

 

 

 

составьте уравнения реакций получения уксусной кислоты Изацитилена по реакции Кучерова Изэтилового спирта Сколько граммовуксу3сной кислоты образовалось если окислили 23 г этилового спирта ?

Составьте структурные формулы кальциевыхсолей муравьиной уксусной и пропионовой кислот

Read the text ‘Birthdays in Britain”

 On your birthday you get cards and presents from your family and friends. Parents often buy a big present like a bike or an MP3 player. Other people give toys, sweets, books, clothes, CDs, DVDs and things like that. People normally have a birthday party for their friends. There’s usually a birthday cake with one candle for each year of your age. The person with the birthday blows out the candles and makes a wish. Then everybody sings “Happy birthday!” People often have a party at their own home. Some older children don’t have a party. They take their friends to the cinema, a bowling alley or somewhere like that. My friend, Anna, in Hungary says that they have “name days” in their country, but we don’t have “name days”. Anna also says that people in Hungary give flowers on name days and birthdays. In Britain, we usually give flowers only to women. Cameron and I give flowers to our mum on her birthday.

2задание к тексту

 Put these headings into correct order according to the text. 1) A birthday cake 2) Name days in Hungary 3) Birthday presents 4) Places to take friends to on a birthday 5) Giving flowers on name days and birthdays помогите плииииииз буду очень благодарна

1 клетки многоклеточного организма образуют...

2 согласованное взаимодействие клеток ,тканей, органов образует...