丰富多彩的颜色分为（）和（）两大类。
参考答案：无彩系；有彩系
Hiking by oneself can be fun and good for health.It may also be good for________building.[ ]
A. respect
B. friendship
C. reputation
D. character
火腿中如发现变色的肥膘，加工时应切除。( )
