Scientistshavelearnedalotaboutthekindsoffoodpeopleneed....
問題詳情：Scientistshavelearnedalotaboutthekindsoffoodpeopleneed.Theysaythatthereareseveralkindsoffoodthatpeopleshouldeateveryday.Theyare:(1)greenandyellowvegetablesofallkinds;(2)citrus（柑橘）fruitsandtoma...