Расположите пропущенные предложения в таком порядке чтобы получился связный текст. 1_______. Althoug...: ответ на тест 911968 - Английский язык

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
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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Organic chemistry is the study of compounds containing carbon. It is called “organic” because scientists used to think that these compounds were found only in living things or fossils. However, vast numbers of different carbon-containing compounds can now be produced artificially in laboratories and factories, for use in industry. For example, drugs, plastics, and pesticides are all synthetic organic substances. About 4.5 million of the 5 million compounds known today contain carbon.
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What is organic chemistry?

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
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_______.

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
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_______.

Расположите пропущенные предложения в таком порядке, чтобы получился связный текст.
1_______. It can be called, molecular biology. Biochemistry is known to be the study of the structures and reactions of the thousands of compounds involved, in life process. 2_______.
Living things are supposed to represent the most efficient, sophisticated, compact chemical “factories” ever known. 3_______? When the body is afflicted by disease or by a wound how does the body protect itself and repair the damage? 4_______.

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Cigarette smoking is a harmful habit which reduces the expectation of good health and shortens life. Cigarette smokers absorb into the lungs:
1. Nicotine. This is a habit-forming drug with a mild stimulatory effect. It causes construction of small blood vessels and a rise in blood pressure.
2. Carcinogenic tars. These tars isolated from cigarette smoke have been shown to cause cancer in experimental animals.
3. Carbon monoxide. Cigarette smokers have raised blood levels of carboxyhaemoglobin passes through into the fetal circulation.
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Nicotine causes construction of small blood vessels and …