написать структурную формулу C4 H9 cl

перечислите, в чем заключается хозяйственное значение рыб для человека.

За сутки матка пчелы отеладывает 2000 яиц. Сколько яиц она откладывает за 1 час???

1) на каком растояние нужно расположить два заряда q1=5*10^-9Кл, и q2-6*10^-9 Кл чтобы они отталкивались друг от друга с силой F=12*110^-5 Н   ?

Помогите,пожалуйста!

Many people, especially young people, wear things which express their ideas and feelings about life. If a boy (have) very short, almost shaven hair, people expect him to have right wing politics. But boys with very long hair (think) to have left wing politics. A boy who wears a leather jacket (cover) in bits of metal will probably ride a motorbike. The Rules of fashion are not as rigid as they once were and today’s teenagers (not follow) any particular trend at all. But teens are very Influenced by (celebrity) and they have a desire to buy more luxurious Items. Street styles (not create) by the big fashion designers. In fact, the fashion designers often use ideas from street fashions. But some leaders of British fashion have enough ideas of their own. One of them Is Jean Muir, whose designs let her be one of the (good) designers.

Нужно поставить в правильной форме. Заранее блогодарна!