初中阶段是身体生长发育的重要时期，应该养成良好的饮食习惯．有些同学只吃肉，不吃水果和蔬菜，长此以往会造成身体缺乏（ ）
A．维生素C
B．脂肪
C．蛋白质
D．糖类
合理营养就是指膳食中所含的营养素种类齐全，数量充足，比例适当，并与身体的需要保持平衡．平衡膳食是合理营养的核心．健康食谱，要合理营养、均衡膳食，食物应多样化，荤素搭配要合理，营养全面合理．肉含丰富的蛋白质和脂肪等营养物质，水果和蔬菜含丰富的维生素C等营养物质，因此有些同学只爱吃肉，不爱吃水果和蔬菜，常此以往会造成身体蛋白质和脂肪的积累剩余，而致肥胖，同时会导致缺乏维生素C等营养物质，缺乏维生素C易患坏血病．可见A符合题意．
故选：A
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| Mr Smith was having trouble with his stomach, 1 he went to see a doctor. The doctor 2 his stomach carefully but couldn't find any problem. Then he said, "Well, Mr Smith, take it easy. There is 3 serious. Stop smoking and then you will be all right very 4 ." "But doctor," answered Mr Smith, "I 5 . I don't like smoking at all." "Oh, I see," said the doctor," then stop 6 wine from now on." "But I don't drink wine," answered Mr Smith. "Don't drink 7 tea or coffee then," the doctor said to him. "I _8 drink water," answered Mr Smith, "I don't like tea or coffee." The doctor _9_ for a while and then said," Well, what do you like to eat then?" "Potatoes! I like potatoes very much." Mr Johnson answered at once. "All right, Then stop 10 potatoes." Said the doctor as he got up to say goodbye to Mr Smith. | ||||
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