Change the sentences according to the examples.

The Origin of Infection.

It was difficult to divide the infectious diseases at man but the scientists have succeeded in this and infection diseases are divided into two large groups. Some diseases affect only men, others affect both man and animals, with man most frequently infected animals.

Every infectious disease is known to have hot only characteristic clinical manifestations but also its own specific way of invasion into human body.

Such a disease as dysentery [‘disentri], which is one of the diseases of the intestinal infections, is spread through the intestines and stools.

The infections of the respiratory [‘respire’tori-Amer; ‘respire’tri - Brit] tract is reported to compose the second subgroup. During coughing or talking the pathogens are discharged from the infected organism with the mucus [‘mjukes] слизь from the membranes of the respiratory tract into the air in the form of drops. The infection is spread when the air containing drops of mucus with the pathogens in it, is breathed in. The diseases of these subgroups are diphtheria [dif’sierie], smallpox оспа, etc.

Scientists consider diseases at the third subgroups to be spread through the skin and the mucosa in which the pathogens multiply. In some cases it is the skin, in others it is the mucous membrane of the eye. Direct contact and various things belonging to the sick may be responsible for spreading the infective agent.

The diseases of the fourth subgroup are mentioned to be spread by living insects. The pathogens causing these infections circulate in the blood or lymph and are not discharged from the organism. The insects become infected as they ingest глотать, принимать внутрь the blood of a diseased man. They become infectious for other people after the pathogens have multiplied in their organism. All these diseases, of which encephalitis [en’sefe’laitis; en’kefe’laitis] is an example, are called blood infections.

Change the sentences according to the examples.

Example: It is simple to solve this problem. — This problem is simple to solve.

It is difficult to speak to such people. — Such people are difficult to speak to.

1. It is expensive to buy a mink coat. 2. It is impossible to get a good dinner in our canteen. 3. It was difficult to start an engine in such cold weather. 4. It is dangerous to stand on this ladder. 5. It is rather difficult to deal with stubborn people. 6. It is dangerous to drive a car in big cities. 7. It is interesting to meet new people. 8. It is simple to communicate with people due to Internet. 9. It was unpleasant to watch their quarrel. 10. It is always funny to listen to him.

· Read and translate the sentences into the native language and define the

Complex Subject:

1. Jaundice is known to be present in the diseases of liver as well as in the

diseases of intrahepatic and extra hepatic ducts.

2. The characteristic clinical manifestations of gastric carcinoma are known to

Be epigastria pains, loss of weight, nausea and vomiting of blood.

3. Too hot food is supposed to contribute to the development of gastritis.

· Find the Complex Subject in the given sentences:

1. On physical examination the liver was considered to be enlarged.

2. The damage to the blood supply was supposed to have been present before the operation.

Both mental and physical overstrain have been estimated to affect the normal function of the heart in the most unfavorable way.

Date: 2016-04-22; view: 1085