Прочитайте текст и ответьте на вопрос: How many types of atom does carbon dioxide have Aluminium Al ...: ответ на тест 912157 - Английский язык

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Aluminium, water, oxygen, and carbon dioxide are substances. Some substances are elements and some substances are compounds. Elements have only one type of atom whereas compounds have more than one type.
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How many types of atom do elements have?

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Aluminium, water, oxygen, and carbon dioxide are substances. Some substances are elements and some substances are compounds. Elements have only one type of atom whereas compounds have more than one type.
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How many types of atom do elements have?

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How many times did Gagarin orbit the Earth?
A Russian cosmonaut (astronaut) named Yuri Gagarin, who graduated from the Air Force school at Orenburg in 1957, made the first manned spaceflight. He was launched into space aboard the spacecraft Vostok 1 on April 12, 1961. He orbited the Earth once in one hour and 29 minutes reaching a maximum altitude of 187 miles (301 kilometres). The ship landed the same day at 10:55 a.m. It was Gagarin’s only space flight.

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Squares and rectangles are shapes. Squares have four sides. Rectangles also have four sides. Triangles do not; they have three sides. Circles are also shapes but they do not have sides.

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An electric current is a flow of electricity. There are two kinds of electricity, positive and negative. Glass rubbed with silk is positively charged, ebonite rubbed with fur is negatively charged.
Like charges repel, unlike charges attract. The leaf electroscope is used to detect, distinguish and measure charges.
The ultimate particle of negative electricity is called the electron; that of positive electricity is called the proton.

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Concorde, the world’s fastest passenger plane, was developed by France and Britain together. 1_______. £1.5 billion was spent on developing Concorde and it was tested for over 5,000 hours, which makes it the most tested plane in history. 2_______. Concorde holds many world records, including the fastest crossing of the Atlantic from New York to London, which was achieved in 2 hours 45 seconds! Flying at twice the speed of sound means that flying time is reduced by half, which is why the Concorde flight between London and New York is used a lot by business people and film stars – you can leave Britain at 10.30 and arrive in New York an hour earlier! 3_______. But there are no plans to build any more. 4_______!