读“我国主要大型水电站分布示意图”，完成问题．
 
大型水电站在图示地区集中分布的原因（ ）

在人与人交往中，语言文明，“请，您好，谢谢，对不起，再见。”这十个字不离口，不骂人，不讲粗话。这说明文明礼貌     （   ）

①体现一个民族的精神面貌   ②可以增进人们之间的感情

③影响社会风气和人际关系   ④体现一个人的文化修养和道德品质

阅读下面材料，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。

    We  are what we eat because what we eat every day has ____ great impact on our health.Therefore，we should make everyeffort to change our bad eating habits. ____ we all know，baked or fried foods may be ____(taste) , but eating toomuch of them will ____(probable) result in some illnesses. Moreover, some foodthat costs us a great deal of money and is not healthy is junk food.

____(compare)withpeople in the West, Chinese people used to eat more grain and vegetables, but____(little)meat, which is a good eating habit. However, things are quitedifferent now. With the rapid economic ____(grow)of our country, we now areeating a lot of food that is high in sugar and fat. We ____(run) the risk ofeating out without considering the balance of our diet.

      The food we choose affects our health, so wemust keep ____mind that the food we choose should give ____(we) the nutrientswe need.

长向媒体投诉，说我市一些中小学校门口又有小店在向学生兜售不安全的麻辣食品，商贩们都管叫“五毛零食”，三年级的女儿吃了一两次就上瘾，吃了就拉肚子。
结合上述材料谈谈如何治理校园周边的“五毛零食”？