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Определите количество водородных связей во фрагменте молекулы ДНК с решением!
Ответы 1
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Во фрагменте молекулы ДНК с указанной последовательностью ЦАГ-ГЦА-ЦТТ-ТЦА-ЦГТ-ЦАЦ-ГЦЦ имеется 36 водородных связей.
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Автор:
butch - 1 год назад
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Помогите пожалуйста с Русским.
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Предмет:
Русский язык -
Автор:
dixiefrazier - 1 год назад
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Ответов:
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Reading 32 Martin went to Beijing 4 years ago, but he couldn't visit the Great Wall. He always wanted to see it but his tour guide didn't take them there because it was winter. Luckily, Martin visited the Great Wall of China during his Asia tour last June. He booked a private tour and had a wonderful time because the tour guide was excellent. him from hotel at 6 a.m. He also spoke English well. The friendly guidere were different ways to get to It took them 2 hours to get to an the Wall. He took the cable car and bought a ticket for it. He could take the photos of flowers and trees in various colours from the top. He had read about the history of the Great Wall before he visited there and it made his journey more interesting. The Chinese built this wall to protect their country from enemy attacks. People call it "the longest cemetery" because a lot of workers died during the construction. At the end of the day, he was very tired but he enjoyed every minute of the trip. 1. What is the passage mainly about? A) Tour guides C) Different ways to the Great Wall E) Martin's photos B) The history of Asia D) An interesting journey 2. Which question has no answer in the passage? A) Why did the Chinse build the Great Wall? B) When did Martin visit the Great Wall? C) How much did he pay for a private tour? D) What language did the guide speak? E) How long did it take them to get to Mutianyu? 3. Which word in the passage is a synonym to the word "to defend"? A) to die B) to imagine C) to prefer D) to visit E) to protect 4. Choose the wrong statement according to the passage. A) Martin didn't know anything about the Great Wall before he visited it. B) Martin enjoyed his trip to the Great Wall. C) A lot of workers lost their lives during the construction of the Great Wall. D) Martin couldn't go to the Great Wall 4 years ago. E) Martin took the photos of flowers and trees from the top of the wall. 5. Choose the correct statements to complete the sentence(s) according to the passage Martin's visit to the Great Wall was excellent because .... 1. it was winter 2. the tour guide was excellent 3. he had read about the history of the Great Wall 4. he went there in his car 5. he bought the photos of flowers there
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Предмет:
Английский язык -
Автор:
ivy11 - 1 год назад
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Ответов:
1 -
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- Две материальные точки двигаются в противоположных направлениях по двум концентрическим окружностям радиусами 2 м и 4 м. Периоды обращения точек таковы: 12 с у точки, вращающейся по маленькой окружности, и 24 с у точки, вращающейся по большой окружности. В некоторый момент времени точки оказываются на линии, проходящей через общий центр окружностей. Определите расстояние между точками через 2 с после этого момента. Ответ дайте в м, округлив до десятых.
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