He proved himself a true gentleman and the beauty of his________was seen at its best when he worked

with others.[ ]

A. advantage  

B. appearance

C. qualification  

D. character

城市绿化卫生要求中哪一项是错误的（）

A.绿化要满足调节微小气候要求

B.绿化要满足环境中O₂和CO₂平衡要求

C.南方夏季闷热和人口密集的大城市不可安排太多绿地面积

D.绿化要全市均衡分布，形成点、线、面结合绿地系统

E.应选择树冠大、生长快且具有环保作用的经济树木