Прочитайте текст The main difference between normal and cancer is one of the growth and differentiat...: ответ на тест 781739 - Английский язык

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The main difference between normal and cancer is one of the growth and differentiation: most cancer cells are in their structure more like those of the young organism (fetus) than those of the adult.
They generally grow and divide more rapidly and in a disorganized fashion, but normal cells only divide and grow until they come into contact with adjacent cells and then stop their growth.
Researchers have tried to treat cancers by using drugs which inhibit the division of cells. The most rapidly dividing cancer cells will be affected by these drugs before the more slowly growing normal cells.
The major problem in cancer research now is concentrated on trying to find out the more delicate difference between cancer and normal cells.
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Researchers have tried to treat cancers by using drugs which _______.

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The main difference between normal and cancer is one of the growth and differentiation: most cancer cells are in their structure more like those of the young organism (fetus) than those of the adult.
They generally grow and divide more rapidly and in a disorganized fashion, but normal cells only divide and grow until they come into contact with adjacent cells and then stop their growth.
Researchers have tried to treat cancers by using drugs which inhibit the division of cells. The most rapidly dividing cancer cells will be affected by these drugs before the more slowly growing normal cells.
The major problem in cancer research now is concentrated on trying to find out the more delicate difference between cancer and normal cells.
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Researchers have tried to treat cancers by using drugs which _______.

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Gallstones are found in 10-15% of people. They have been discovered even in the new-born. However until the age of 15-20 their occurrence is extremely rare. After the age of 70 gallstones may be found in every third person, the incidence of the disease among women being considerably more than among men.
Gallstones are formed in the gallbladder and bile ducts. Their origin is due to disturbances of cholesterol metabolism, that is an increased amount of cholesterol in the blood and bile. Inflammatory processes in the gallbladder and bile ducts are also responsible for the development of gallstones.
The chief symptoms of cholelithiasis are attacks of sharp pain in the right hypochondrium, they often being accompanied by vomiting, chill, and a high temperature. Jaundice may develop in cases when a gallstone occludes a large hepatic or bile duct.
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They have been discovered even in ________.

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Acute hepatitis may have a chronic course. Prolonged irritation of the liver by chemical or bacterial toxins results in the inflammation of the liver parenchyma, it being accompanied by atrophy of the liver cells.
In the initial stage chronic hepatitis may develop without any clearly marked symptoms. In certain forms of the disease the main symptom is jaundice, it lasting for several months or even years.
As soon as chronic hepatitis is diagnosed it is necessary to eliminate the cause of the condition. If tuberculosis or malaria are responsible for the disease they must be treated first.
Treatment during exacerbations is the same as for as acute hepatitis. During remissions the general and dietary regimen may be more varied. The diet must be nourishing and varied, but alcohol and fat food must be completely excluded.
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If tuberculosis or malaria are responsible for the disease _______.

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A local tendency to colds is caused by chronic hypertrophies and congestions of the nose and throat, by subacute or chronic catarrhs of these areas. Colds may be produced by any condition of the lungs or heart that may cause congestions of these mucous membranes, and particularly by such a condition of the nose or nasopharynx mucous membranes which will cause mouth breathing more or less constantly. Such patients are more sensitive to acute infections of the throat and lungs than are those who breathe through their nose.
A general tendency to colds is produced by hypersensitivity or decreased resistance of the body to microorganisms and dust particles in the atmosphere.
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A local tendency to colds is caused by _______.

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Louis Pasteur was born in 1822. He was a prominent French chemist, one of the founders of modern microbiology.
His research work helped much to establish the field of bacteriology. In his early years Pasteur devoted his energies to the discovery of microorganisms in wine and beer production. He introduced the idea of heat sterilization (pasteurization) for these products and milk too.
In later life he became interested in hydrophobia. Working in this field he developed the principle that viral pathogenic properties could be attenuated by passing the virus through the body of a proper animal. On the basis of these observations he developed a vaccine for hydrophobia.
Continuing his investigation L. Pasteur discovered the method to prevent some infectious diseases by introducing attenuated causative agents. This method is known as vaccination. It has helped to fight against many infectious diseases.
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In later life he became interested in _______.