北京农学院的学生们唱着毕业歌告别学校。他们中的134名大学生“村官”奔赴北京郊区的乡镇村落，成为京郊的“村官”。他们说：“我们要在农村谱写属于我们的青春乐章！”这些选择做“村官”的大学生用实际行动告诉我们（   ）

①实现人生意义，就应该干一番轰轰烈烈的事业

②实现人生意义，应该从现在做起，从点滴小事做起

③做好本职工作是实现人生意义的重要基础

④我们要在不懈追求中实现人生的意义

    In May, 1976, Gaynor was a nine-year-old girl and lived in North Wales. One day, on her way home from school, she saw a silver(银色的)object(物体)in a field not far from her home. The object looked like a saucer.
    Gaynor was very scared. She stayed behind the tall grass and watched the door of the strange object open. She saw two aliens wearing silver suits get out. Then they used something to examine(检测)the ground. They were short and had pink eyes. After about thirty minutes, the two aliens went back into the object. Then it took off.
    When Gaynor got home, she told her mother about this unusual experience, but her family decided to keep quiet about it. They didn’t want others to laugh at their daughter.
    However, 18 months later, Gaynor told her story to UFO scientists. They found out that Gaynor told the truth.

①宪法是国家的根本大法

②强化宪法权威，要做好宪法教育，丰富宪法学习的形式与内容

③宪法地位最高，是普通法律的总和

④宪法是依法治国的根本依据，学习宪法是每位公民的义务

下列各组离子在指定的溶液中，能大量共存的是
①酸性溶液中：Fe²⁺、Al³⁺、NO₃^－、Cl^－、I^－
②pH=13的溶液：Na⁺、CO₃^2－、SO₃^2－、AlO₂^－、S^2－
③水电离出来的c(H⁺)＝10^-13mol/L的溶液：NH₄⁺、K⁺、NO₃^－、S₂O₃^2－
④加入铝片能放出H₂的溶液：Na⁺、HCO₃^－、Cu²⁺、SO₄^2－
⑤滴加石蕊试液显红色的溶液：Fe³⁺、NH₄⁺、Cl^－、NO₃^－