I．“精制”过程是将含有少量CO、CO₂、O₂和H₂S等杂质的原料气体通入含有氨水的醋酸亚铜二氨（化学式为Cu （NH₃）₂Ac）溶液，以获得纯净原料气．其中，吸收CO的反应为：

CO+Cu （NH₃）₂Ac+NH₃•H₂O⇌Cu （NH₃）₃COAc+H₂O△H＜0．

    It is Sunday tomorrow. We are going to watch a football game. It is between a Japanese team and a Chinese team. The football game will begin at 4：00 in the afternoon. Our teacher, Mr. Wang will watch the football game with us. We will go there by bus. We think we can come back at about 6：00 in the afternoon.

“校长爸爸”莫振高连续30多年用自己微薄的工资资助近300名贫困生，让他们顺利考入大学。下列对他的善举认识正确的有（    ）

①他这种奉献精神，是社会责任感的集中体现   ②有意义的人生只能在艰苦的环境中锻炼

③他承担责任，不计代价与回报                           ④他关爱社会，积极参加公益活动