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Dear Madam or Sir,　　I am a university graduate of Economics,......

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单项选择题
The word schism ( Line 3, Paragraph 1 ) in the context probably means ____________.
A．confrontation
B．dissatisfaction
C．separation
D．contempt
填空题
Vitamins are organic compounds necessary, in small amounts in the diet for the normal growth and maintenance of life of animals, including man.They do not provide energy, ________ do they construct or build any part of the body. They are needed for ________ foods into energy and body maintenance. There are thirteen or more of them, and if ________ is missing a deficiency disease becomes ________ .Vitamins are similar because they are made of the same elements―usually carbon, hydrogen, oxygen, and ______ nitrogen. They are different ______ their elements are arranged differently, and each vitamin ______ one or more specific functions in the body.________ enough vitamins is essential to life, although the body has no nutritional use for ________ vitamins. Many people, ________ , believe in being on the safe side and thus take extra vitamins. However, a well-balanced diet will usually meet all the body’’s vitamin needs.
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