亚洲基础设施投资银行是由中国倡议设立的多边金融机构。亚投行的法定资本为1000亿美元，中国初始认缴资本目标为500亿美元左右，中国出资50%，成为最大股东。亚投行的成立（     ）

①有利于促进亚洲地区发展，建立国际新秩序   ②有利于提高中国在全球经济治理中的制度性话语权

③有利于发挥中国在国际社会中的主导作用      ④体现了我国外交政策的独立自主的基本目标

实验一：如图是同学们做粗盐提纯实验的操作示意图．

请回答下列问题：

∠A=____°

根据短文理解，完成下列各题。
    In every school there is "top" crowd that sets the pace, while the others follow their lead. For example, if the crowd decides that it is smart to wear bright red sweaters, then very soon everybody is wearing bright red sweaters.
    There is nothing wrong with that, except the fact that for some people bright red sweater is really unsuitable.
    The situation can even become dangerous, if the top crowd decides that it is smart to drink and to drive cars at seventy miles an hour. Then the people who follow the lead are endangering their lives. They are like the sheep being led to the slaughter(屠杀).
    Now it's possible that you have come across situations like these more than once in your life. In fact you probably did something you knew to be wrong one time or another. You may have excused yourself by saying, "Gee, the crowd does it."Well, let the crowd do it, but don't do it yourself. Learn to say "No".
    Develop your own standards(标准)and your own judgment. If you know the crowd is planning something you disagree to, you'd better take the courage to bow out in a polite way. You'll have the satisfaction of standing on your own two feet.