Переводить этот текст, только без переводчика. заранее : )) body provides a home for a great number of the smallest organisms – microorganisms. most of them are harmless but some take part in dental diseases. there are three different groups of microorganisms: fungi, bacteria and viruses. they may be of different kinds, both harmless and more or less dangerous. bacteria are subdivided into groups according to their shape bacilli, cocci, spirochetes, spores. bacilli are rod – shaped bacteria. for example, lactobacillus is found in decayed teeth. cocci are round bacteria. streptococci are berry – shaped bacteria which grow in twisted chains. they are associated with different 62 diseases. hemolytic streptococci (called hemolytic because bacteria cause hemolysis) are responsible for such conditions as “strep” throat, tonsillitis. streptococci viridians (viridians means “green” and these bacteria produce a green color on the growth medium) are less virulent (poisonous) than the hemolytic form and cause infections in teeth. staphylococci are bacteria which grow in small clusters like grapes. one strain of staphylococcus may be found in gumboils. there are also spiral bacteria (spirochetes) found in acute necrotizing ulcerative gingivitis. some bacteria can exist in the form of spores. spores can survive extremes of temperature and live for years until conditions become more favorable again. they are highly resistant to destruction.
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dear graham,
i’m sorry to say that we (1) are having (have) a disastrous holiday! to start with, the plane (2) … (was delayed) for six hours, so we (3)… (did not arrive) until 3.00 a.m. fortunately the courier (4) was still…(waiting) to meet us, but when we got to the hotel, we found, they (5)… (had double-booked) our room! so now we (6) are staying in another hotel, which, believe it or not, is still (7) being (built)! this means we (8) … (are woken up) every morning by the workmen. why (9) does it always… (happen) to us? it’s not a very good hotel, either. the shower (10) …(does not work), and yesterday, when we (11) … (were getting) ready for dinner, the water supply (12) … (was cut off). i complanied to the manager, but he (13) … (did not seem) very interested and, of course, he (14) … (has not done) anything about it yet. he has a typical “let’s wait until tomorrow” attitude. (15) do you…(know) what i mean? the weather (16) … (has been) pretty awful since we got here. last saturday we(17)… (took) a train to the capital. (18) have you ever… (been) there? there’s nothing much to see, and when we arrived we (19) … (found) angela (20) … (had forgotten) the traveller’scheques, so we (21) … (did not speak) to each other for the rest of the day!
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