Вопрос № 911965 - Английский язык

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Nutritionists think there are13 vitamins that humans need. 1_______. Vitamin A is important for healthy skin and eyes. Vitamin A in the diet comes from deep yellow fruits and vegetables, such as carrots, dark green leafy vegetables and milk, liver, cod-liver oil. When people have enough B vitamins, their appetite is good and their nerves are calm. 2_______.Vitamin C helps skin tissues to recover from cuts and burns. 3_______. Vitamin D is called the “sunshine” vitamin. It is also in cod-liver oil, milk and butter. Vitamin D helps to build strong bones. 4_______.

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Zinc is a mineral needed for fetal growth and development. Good food sources of zinc include meat, liver, eggs, seafood.
Iron builds maternal blood volume and fetal blood and muscle. Many women enter pregnancy with low iron stores, resulting in anemia. Foods rich in iron include red meat, especially liver, raisins and fortified breads and cereals.

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1_______. If all the carbon and carbon compounds were suddenly removed from the earth it would look like the surface of the Moon. 2_______. In an ordinary pencil, for example, the inside of the pencil made from graphite, which is an elementary form of carbon, the wood and the paint on the surface of the pencil are all carbon or carbon compounds. The paper of a book, the cover are also made of carbon compounds. All of the clothes one wears including shoes cannot exist without carbon. 3_______. Fuels, foods and many drugs are mostly made of carbon compounds. 4_______.

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1_______. Although there are 89 other naturally occurring elements, the number of known carbon compounds is many times greater than that of the known compounds which contain no carbon. 2_______. The name “organic” comes from the past when chemical compounds produced from ones-living matter were called “organic” and all other compounds were called inorganic.
3_______. Every month several hundred new organic compounds are prepared. 4_______.

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1_______. Most, however, become laboratory findings and for the present, at least, have no practical application. 2_______. The million or so organic compounds now known and characterized were synthesized in the laboratories of the world in the past 150 years.
3_______.
Many other organic compounds are prepared from these materials after they are separated into their constituents. 4_______.

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1_______. It is formed when acetyl chloride or acetic anhydride acts on ethyl alcohol. 2_______.
Ethyl acetate is a colourless, mobile liquid, with a pleasant fruity odour. 3_______. It is soluble in water and is miscible with alcohol, ether and chloroform, forming neutral solutions. 4_______.