“两会”期间某人大代表发言时说,人大代表由于历史和各方面的原因,在社会上荣誉地位很高,而把人大代表作为国家权力机关组成人员的职务要求 ,需要进一步加强。作为人大代表,除应当模范遵守宪法和法律外,还应该(　　)

①听取和反映人民群众的意见和要求　②代表国家机关行使行政权力　③努力为人民服务,对人民负责　④代表人民行使一切权力

原子核X衰变为原子核Y，再衰变为原子核Z的过程为：，下述各关系中正确的是

阅读理解
    American country music is also known as(被称为)country Western music．It has a very long history．It comes from the folk songs of immigrants(移民)from Britain．
    Country music uses simple music and words to express everyday feelings such as loneliness，love，and sadness．That is to say，country music describes life．It talks about friends and enemies，trucks and roads，farms and crops．People in many parts of the world like country music，because everyone can understand what the music is about．
    Country Western music became popular first among cowboys(牛仔)in the American West courttryside．Cowboys had to take care of cows day and night．When they were alone with the cows，they often sang beautiful and peaceful songs to calm the animals and to overcome their own fear．They were not well—educated and so they sang about their daily life in very simpie words．They played guitars，violins，and other instruments．  In the south of America，many people added instruments from their homes，like bottles and spoons．  When cowboys visited their friends and families on holidays like Thanksgiving，they usually sang and played country Western music．
    In recent years，many musicians have made country Western music a little different from the one in the past．These changes make the songs sound even better．Today singers such as Garth Brooks， Reba McEntire，Emmylou Harris，Lyle Lovett，Eddie Rabbitt，LeAnn Rimes，Randy Travis，and a group called Alabama are singing and playing in different styles．They have brought country Western music more and more fans from all over the world．

欲配制100ml 1.0 mol/L  Na₂SO₄溶液，正确的方法是（   ）
①将14.2 g Na₂SO₄ 溶于100ml水中
② 将32.2g Na₂SO₄·10H₂O溶于少量水中，再用水稀释至100 ml
③ 将20 ml 5.0 mol/L Na₂SO₄溶液用水稀释至100 ml

2014年是川藏、青藏公路建成通车60周年。这两条公路的建成通车，是在党的领导下新中国取得的重大成就，对推动西藏实现社会制度历史性跨越、经济社会快速发展，对巩固西南边疆、促进民族团结进步发挥了十分重要的作用。当年，10多万军民在极其艰苦的条件下团结奋斗，创造了世界公路史上的奇迹，结束了西藏没有公路的历史。60年来，在建设和养护公路的过程中，形成和发扬了一不怕苦、二不怕死，顽强拼搏、甘当路石，军民一家、民族团结的“两路”精神。2014年8月，******就川藏、青藏公路通车60周年作出重要批示，要求进一步弘扬“两路”精神，助推西藏发展。