歷年考研英語完型填空1996年

[00:05.10]1996 [00:06.69]Vitamins are organic compounds necessary [00:09.52]in small amounts in the diet [00:11.34]for the normal growth and maintenance [00:13.45]of life of animals, including man. [00:16.49]They do not provide energy, (1)nor do they construct [00:19.71]or build any part of the body. [00:22.45]They are needed for (2)transforming foods into energy [00:25.68]and body maintenance. [00:27.72]There are thirteen or more of them, [00:29.74]and if (3)any is missing a deficiency disease [00:32.58]becomes (4)apparent. [00:34.19]Vitamins are similar because they are [00:36.20]made of the same elements--usually carbon, [00:39.17]hydrogen, oxygen, and (5)sometimes nitrogen. [00:43.30]They are different (6)in that their elements [00:45.22]are arranged differently, [00:47.13]and each vitamin (7)performs one or more [00:49.96]specific functions in the body. [00:52.17](8)Getting enough vitamins is essential to life, [00:55.19]although the body has no nutritional use for [00:57.72](9)excess vitamins. [00:59.54]Many people, (10)nevertheless, believe in [01:02.06]being on the "safe side" [01:03.88]and thus take extra vitamins. [01:06.11]However, a well-balanced diet [01:08.63]will usually meet all the body’s vitamin needs.

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