ПЕРЕДЕЛАТЬ предложение в косвенную речь: 1 'I can't find my wallet,'Ben said.
Ben said that he couldn't find his wallet.
2 I've never been jet-skiing,' said Cathy.
3 I'll watch the documentary with you tonight,' said Liam.
4 'We can't go out because it's stormy,' said George.
5 'The volcano has erupted twice this year,' said Harriet.
6 I'll probably study maths at college,' said Chris.
7 'We can visit the aquarium today,' said Joe.
8 'A new florist's has opened in town,' said Mandy.​

решение. 1. ri=2*r; rii=r/2; ri/rii=4; не надо ни о какой площади сечения говорить. два куска проволоки содинили последовательно, получили ri=2*r; два куска той же проволоки соединили параллельно, получили rii=r/2; ну, а теперь раздели первое на второе!

а теперь общий случай: ri=r*n; rii=r/n; ri/rii=n^2; кусок проволоки разрезали на n одинаковых кусков. сначала эти куски соединяют последовательно: ri=r*n; затем соединяют параллельно rii=r/n; ну и дели первое на второе и делай выводы.

1. I will be training in the gym.

2. I think we will win this game!

3. I will do my laundry next Monday.

4. Don't worry, I will explain it to you.

1. We are going to buy a cottage in two months.

2. I will travel around the world in July.

3. I am going to do it now.

4. I think I will stay at home and read tonight.

5. It is going to be an accident.

1. I am going to wash my waistcoat.

2. Will you be using the computer at six o'clock?

3. Jessica will not finish the book until tomorrow.

4. правильно

1. I am not going to visit Lena tonight.

2. By the time he comes back, I will be packing for several hours.

3. We will be lying on the beach at this time next Thursday.

4. Will you go there?

Объяснение: