对物质进行分类，是研究物质的基本方法。在下面的四种化合物中，与另外三种不属于同一类别的物质是(    )

下图是某城市的一座雕塑，寓意中国人民禁烟运动的伟大胜利，其主题是“怒折烟枪”。整个枪杆两头朝下、中间向上，裂开的一侧形成犬牙状的尖锐裂口，愤怒地直刺蓝天。该城市是（   ）

    When my friend Lesa was diagnosed（诊断） with cancer, another friend and I went to the hospital to spend some time with her. We bought her a small toy and  named him Lemon－Aide. We gave Lemon－Aide to Lesa and told her he was to go with her to all of her treatments to remind her that we were thinking of her and caring about her even though we could not always be with her. When the treatments were completed, she said when someone else needed him she would pass him along.

    A few months later, much to my surprise, it was me that she passed him to. Lemon－Aide went with me to all of my treatments.

    One day while waiting for my doctor I decided we could market the idea to fight cancer. Lesa thought it was a great idea so we founded the organization that came to be known as Lemon－Aide's Friends, Inc. We designed our organization to remind people fighting cancer that there are people who love and care about them all the time. Today we have totally 5013 volunteers. The money raised is donated to cancer patients who do not have insurance. The physicians on our Board of Advisors determine how and where our money is donated.

    Lemon－Aide is for men, women, and children of all ages and to date has been sent to 34 states and 33 countries to provide smiling support for people fighting cancer. When life gave us lemons we made Lemon－Aide, a soft smiling toy that represents love, support, and encouragement.

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（二）

雨天的屋瓦，浮漾湿湿的流光，灰而温柔，迎光则微明，背光则幽黯，对于视觉，是一种低沉的安慰。至于雨敲在鳞鳞千瓣的瓦上，由远而近，轻轻重重轻轻，夹着一股股的细流沿瓦槽与屋檐潺潺泻下，各种敲击音与滑音密织成网，谁的千指百指在按摩耳轮。“下雨了”，温柔的灰美人来了，她冰冰的纤手在屋顶拂弄着无数的黑键啊灰键，把晌午一下子奏成了黄昏。

在古老的大陆上，千屋万户是如此。二十多年前，初来这岛上，日式的瓦屋亦是如此。先是天黯了下来，城市像罩在一块巨幅的毛玻璃里，阴影在户内延长复加深。然后凉凉的水意弥漫在空间，风自每一个角落里旋起，感觉得到，每一个屋顶上呼吸沉重都覆着灰云。雨来了，最轻的敲打乐敲打这城市。苍茫的屋顶，远远近近，一张张敲过去，古老的琴，那细细密密的节奏，单调里自有一种柔与亲切，滴滴点点滴滴，似幻似真，若孩时在摇篮里，一曲耳熟的童谣摇摇欲睡，母亲吟哦鼻音与喉音。或是在江南的泽国水乡，一大筐绿油油的桑叶被啮于千百头蚕，细细琐琐屑屑，口器与口器咀咀嚼嚼。雨来了，雨来的时候瓦这么说，一片瓦说千亿片瓦说，说轻轻地奏吧沉沉地弹，徐徐地叩吧挞挞地打，间间歇歇敲一个雨季，即兴演奏从惊蛰到清明，在零落的坟上冷冷奏挽歌，一片瓦吟千亿片瓦吟。

在旧式的古屋里听雨，听四月，霏霏不绝的黄梅雨，朝夕不断，旬月绵延，湿黏黏的苔藓从石阶下一直侵到舌底，心底。到七月，听台风台雨在古屋顶上一夜盲奏，千层海底的热浪沸沸被狂风挟挟，掀翻整个太平洋只为向他的矮屋檐重重压下，整个海在他的蜗壳上哗哗泻过。不然便是雷雨夜，白烟一般的纱帐里听羯鼓一通又一通，滔天的暴雨滂滂沛沛扑来，强劲的电琵琶忐忐忑忑忐忐忑忑，弹动屋瓦的惊悸腾腾欲掀起。不然便是斜斜的西北雨斜斜刷在窗玻璃上，鞭在墙上打在阔大的芭蕉叶上，一阵寒潮泻过，秋意便弥湿旧式的庭院了。

在旧式的古屋里听雨，春雨绵绵听到秋雨潇潇，从少年听到中年，听听那冷雨。雨是一种单调而耐听的音乐是室内乐是室外乐，户内听听，户外听听，冷冷，那音乐。雨是一种回忆的音乐，听听那冷雨，回忆江南的雨下得满地是江湖下在桥上和船上，也下在四川在秧田和蛙塘，——下肥了嘉陵江下湿布谷咕咕的啼声，雨是潮潮润润的音乐下在渴望的唇上，舔舔那冷雨。

　　因为雨是最最原始的敲打乐从记忆的彼端敲起。瓦是最最低沉的乐器灰蒙蒙的温柔覆盖着听雨的人，瓦是音乐的雨伞撑起。但不久公寓的时代来临，台北你怎么一下子长高了，瓦的音乐竟成了绝响。千片万片的瓦翩翩，美丽的灰蝴蝶纷纷飞走，飞入历史的记忆。现在雨下下来下在水泥的屋顶和墙上，没有音韵的雨季。树也砍光了，那月桂，那枫树，柳树和擎天的巨椰，雨来的时候不再有丛叶嘈嘈切切，闪动湿湿的绿光迎接。鸟声减了啾啾，蛙声沉了咯咯，秋天的虫吟也减了唧唧。七十年代的台北不需要这些，一个乐队接一个乐队便遣散尽了。要听鸡叫，只有去诗经的韵里找。现在只剩下一张黑白片，黑白的默片。