据悉，日本大地震导致上万人瞬间伤身，同时也殃及核电站，致使核电站出现了一系列问题，如冷却装置失效等，进而发生爆炸。由此，反映了系统具有哪个性质（   ）

材料一：《国民经济和社会发展第十二个五年规划纲要》把建设“资源节约型、环境友好型”社会作为转变经济发展方式的重要着力点。
材料二：“谁知盘中餐，粒粒皆辛苦”。******关于“厉行勤俭节约、反对铺张浪费”的讲话在互联网上引起强烈共鸣。为了更为有效地反对浪费,不少网民在网络上发起以吃光盘子里的东西为主题的“光盘行动”。
结合上述内容，学校初三年级（1）班学生开展了一次实践探究活动，请你与他们共同完成下列任务。

先通读下面的短文，掌握其大意，然后从A、B、C、D四个选项中选择可以填入空白处的最佳答案。    Do you have a good friend? I have one. She's English and1name is Kate.We are in the same (相同的)2and my desk is next to hers.She is nice and I3her well.She always4me with my English and I always tell her how to say "quilt", "grandma", "radio" …in Chinese.She likes reading and she has so many5in her room.They are everywhere — on her bed, on the sofa and on her desk ...Some of them are6the computer.She7it's very important(重要的).Look! This is a8of Kate's family.9people(人)are in it：her parents.her sister, her brother and herself(她自己).Kate's mother Helen is our English10.She teaches well and she's good to us.We like her very much.

下列语句中，标点符号使用正确的一项是（   ）

警察的责任是维护社会治安，医生的责任是治病救人。这说明责任伴随人的一生。（   ）