合理膳食包括()
A.能量和营养素满足需要
B.食物多样化
C.营养素之间要保持适宜的平衡
D.应有舒适的进餐环境
E.以上都包括
参考答案:E
Don't be too general. Please give a ________ suggestion on how to deal with this difficulty. [ ]
A. concrete
B. abstract
C. complete
D. fragrant
挑选羊时应该注意选择什么样的羊?