2. Rice: 1, starch: rice contains starch 62%-86%, protein 6%-9%, fat 0.6-3.9%, water 13%- 16% and a small amount of amino acids and vitamins.

3. Corn: Because there are many kinds of corn, there are great differences between them. Take ordinary corn as an example. Every 100g corn contains protein 85g, fat 4.3g, calcium 22mg, phosphorus 120mg, iron 1.6mg and vitamin e b 1 B2, and its germ contains 52% unsaturated fatty acids, which is 4-5 times that of polished rice. Corn oil is rich in vitamin E, vitamin A, lecithin and magnesium, and linoleic acid is as high as 50%.