***在谈到改善民生时引用这样一句话“乐事还同万众心”，用今天的话说就是让人民共享改革带来的红利成果，对此理解正确的是（  ）

①这是由我国国家性质与政府性质决定的

②政府要把人民利益与谋求自身利益相统一

③人民的利益福祉是政府职责所在

④政府的一切行为都要服务于全体公民

小明于2014年6月21日（夏至日）这一天进行了“立竿见影”的探究活动，读图回答问题

若小明观察到正午时刻竹竿的影子长度为0，则穿过当地的纬线是（ ）
      

    Hello, my name is Gina. John, Anna and I are good friends. We are in the same grade (年级). But they are in Class Five and I am in Class Three. We get up at 7:00 and go to school at 7:30. In the morning we have four lessons. We have English every morning. John and Anna have English at 10:00 in the morning and I have it at 11:00. English is my favorite subject. Math is their favorite. And we all like P.E.

    In the afternoon, we have three lessons. At 2:30 we have the art lesson in the same classroom. After school we often play soccer. We all like soccer. Sometimes (有时) we watch TV at my house. We don't play any computer games.

根据短文内容，选择正确答案。

将词语的序号依次填入下面语句的横线处。

       走进人生的春天，固然要以浓烈的深情抒写壮志，畅快的豪情激荡锐气，但更需要以清醒的头脑____躁动，以厚道的心地____偏激，以沉稳的步履____沉醉。

A．踏破    B．稳住    C．沉淀