1.Число атомов водорода в формульной еденице вещества 

3,3,5-триметил-4-этилгепт-ин-1-ен-6

варианты:

1)20

2)17

3)15

4)12

5)10

 

 

Что такое абиотический фактор?

Рассказ из 5-7 предложений про упрямых детей для ребенка 1 класса

ПЕРЕВЕСТИ И ВСТАВИТЬ НУЖНЫЕ СЛОВА!!!

Trafalgar Square is situated in the center of London.

But it is well known all over the world.

The square is famous for Nelson's Column.

There are ... at the bottom of the column.

You can see lovely fountains and historical Trafalgar Square is full of tourists.

They take phptps, walk around the square, and enjoy the sights.

In December there is ... in the centre of the square.

  It marks the beginning of Christmas and New Year in Great Bratain.

Different cultural festivals take placein the square.

Everyone can take part in the events.