Вопрос по биологии:

Почему половое размножение имеет большое значение в жизни растений?

Вопрос по физике:

Для выяснения удельной теплоёмкости молока провели следующий

эксперимент: в железную кружку массой 200г налили 20мл молока и

поставили на спиртовку. Начальная температура кружки и молока 20С.

Наблюдения проводили до достижения температуры молока 70С. По итогам

наблюдения заметили, что объём спирта в спиртовке стал меньше на 2мл.

Считая, что вся энергия, которая образуется при сгорании спирта, передаётся кружке и её содержимому, рассчитайте удельную теплоёмкость молока.

Вопрос по биологии:

Вопрос по геометрии:

Вопрос по английскому языку:

11 класс английский язык

8 Choose the correct answer. [5 points] 1 Michael can’t come to the phone right now. He’s gone / been to the supermarket. 2 I’m so excited. I have never been / gone to Paris before! 3 Have you been / gone to that new restaurant yet? 4 Shhh! Be quiet. Your father has been / gone to bed. 5 She has been / gone to Lefkada and won’t be back for a week.

9 Complete with the present perfect or past simple using the words in brackets. [6 points] 1 Last year I _________ (break) my leg playing football. 2 She doesn’t want to go to the movie because she _________ (see) it. 3 She _________ (be) there before, so I don’t think she will want to go. 4 When was the last time that you _________ (visit) your grandmother? 5 I am so upset. I _________ (drop) my mobile phone and it broke!

7 Choose the correct answer. [5 points] 1 They have never eaten / have never eating a mango before. 2 I have studied / have been studying guitar playing for ten years. 3 Michael has been waiting / has waited for three hours to buy a ticket to the movie. 4 Don’t worry about that, Erika. Jim and Julia have brought / have been bringing the wine. 5 She has been / has been being to Thailand before.

6 Complete the text with the present perfect or present perfect continuous. [5 points] I 1) _________ (take) karate lessons with my friends for a year now and I love it! My friends 2) _________ (take) lessons before and are a bit better than me. We 3) _________ (train) really hard for a competition next week. I don’t care if our school wins or loses, as long as we all try our best. My classmates 4) _________ (be) very helpful because they know that I 5) _________ (never compete) before.