Mr. Brown works on a farm. Mr. Green works in a park. But they don't know each other. Today is Sunday. Mr. Brown comes to the park. He feels tired. He wants to have a little rest. He sees a red chair under a tree over there. So he walks to the chair. Mr. Green is behind him. Mr. Green runs to the chair with a board when he sees Mr. Brown come to the chair. But Mr. Brown runs faster（更快） than Mr. Green. Then he sits on the chair. Mr. Brown is very happy. But Mr. Green doesn't say anything. He gives the board（板子） in his hand to Mr. Brown. It says, "Wet Paint(油漆未干). "

云南省保山原地委书记杨善洲奋斗一辈子，让老百姓的日子富了起来，退休后义务植树20年，把自己建成的5.6万亩森林无偿移交给国家。杨善洲的行为（    ）

①体现了中华民族艰苦奋斗的传统美德       ②说明要实现人生价值，就必须放弃个人利益

③诠释了生命的价值在于创造和奉献           ④是关爱自然、实现人与自然和谐相处的表现