Methods 116 students took part in nutrition elective course completed a survey consisting of five multiple-choice questions concening folic acid and birth defects.

　
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  • 方法選擇醫學(xué)院參加營(yíng)養選修課的116名學(xué)生為調查對象,開(kāi)展有關(guān)葉酸與神經(jīng)管畸形的問(wèn)卷調查。
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