Fats and sugar are very rich in energy but poor in vitamins

Fats and sugar are very rich in energy but poor in vitamins and minerals.
名词前为什么不加冠词,

-水影- 1年前已收到2个回答举报

liuweihong98 幼苗

共回答了14个问题采纳率：100% 举报

对物种（某一个种类的对象）的全称,不用加冠词.
多看些纪录片就会很熟了.
脂肪和糖类富含能量,但是只含有很少的维生素和矿物质.

1年前

风飘波波幼苗

共回答了2个问题举报

名词前加冠词 1、表类属 2、表特指

1年前

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