问题 读图填空题

夜盲症是缺少维生素__________;为了防治地方性甲状腺肿,应该食用含有__________的食盐。

答案

A   碘

题目分析:人体对维生素的需要量很小,但作用缺很大,人体一旦缺乏,甚至引发疾病,如人体如果缺维生素A,会得夜盲症、皮肤干燥、干眼症等,缺维生素B1,会患神经炎、脚气病、消化不良等,缺维生素C会患坏血病、抵抗力下降等,缺维生素D会患佝偻病、骨质疏松等;碘是合成甲状腺激素的重要原料,缺碘易患地方性甲状腺肿。

点评:此题为基础题,难度一般,解答此题的关键是熟记各种营养物质的作用。

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