下列说法正确的是【    】 A.用甲醛溶液浸泡海产品保鲜     

下列说法正确的是【   

A.用甲醛溶液浸泡海产品保鲜             

B.微量元素是人体必需的营养素,多吃无害

C.食品袋里冲入氮气延长食品的保质期   

D.有机物都是含碳的化合物,COCO2也是有机物

答案

C

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