Прочитайте текст. White blood cells are about 1.5 to 2 times as large as red blood cells which outnu...: ответ на тест 1104753 - Английский язык

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White blood cells are about 1.5 to 2 times as large as red blood cells, which outnumber them by at least 500 to 1. The average number of white blood cells in the healthy adult is around 7,000 per cubic millimeter. In the presence of infection this number may go as high as 40,000. A great increase in the white blood count is almost always a sign of infection.
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In the presence of infection the average number of white blood cells …

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Blood cells are of three kinds: red blood cells (erythrocytes), white blood cells (leukocytes and lymphocytes), and blood platelets.
Red blood cells are approximately round, disk-shaped with high edges. They measure approximately 1/3,000 of an inch in diameter. The healthy male has about 5 million red blood cells per cubic millimeter of blood. A healthy woman has about 10% fewer.
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In humans, mature red blood cells are …

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White blood cells play the role of scavenger. Most of them engulf and devour bacteria and other particles of foreign matter in the blood stream. Hence they prevent and fight infection and aid in wound repair. Pus is made up largely of dead white blood cells.
The names of various different kinds of white blood cells are long and complicated: for example, polymorphonuclear eosinophil. Because they devour bacteria, they are also called phagocytes. White blood cells are made in the bone marrow, the lymph nodes, and other places in the body.
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White blood cells are cells of the immune system involved in defending the body against …

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Red blood cells are destroyed and replaced at a rate of about 1% a day. These cells are formed in the bone marrow, particularly in the spine and hip bones, the ribs and breast-bone. They are destroyed largely in the spleen.
Blood platelets are about 1/3 as large as red blood cells. They are concerned with blood clotting.
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Red blood cells begin their existence in …

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27 December, 2010
1_______,
I am requesting authorization to provide the kyphoplasty procedure for Helen Smith.
Mrs. Smith is a 75-year-old woman who presents with a history of osteoporosis and 2_______ that began approximately three months ago. Radiographic imaging including MRI confirms multiple compression 3_______. She also complained about shortness of breath and the sensation of bloating with eating.
Based on the above findings, it is my professional opinion that Mrs. Smith would benefit greatly from the kyphoplasty procedure. Therefore, I request written confirmation of your authorization for this procedure.
4_______,
Tom Grey

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1_______
2_______,
I am writing to request Dr. Choi to issue a medical leave recommendation letter in my favor and have it sent to my employer.
As the records will show, I 3_______ Dr. Choi over three days last week for a spinal disc herniation and was also advised at least two weeks of complete rest.
The recommendation letter must appear on the doctor's personal letterhead or that of the hospital.
Please let me know if you have any questions.
4_______,
J. Wong