开篇列举的六位人物有什么共同的特点？试具体比较分析。

欧洲最长的河流是  (    )

                                                                                                                                  精彩语段品读
        他的面孔黄里带白，瘦得教人担心，好像大病新愈的人，但是精神很好，没有一点颓唐的样子。头发约莫一寸长，显然好久没剪了，却一根一根精神抖擞地直竖着。胡须很打眼，好象浓墨写的隶体“一”字。
      “你要买这本书？”他看了我一眼。那种正直而慈祥的眼光，使我立刻感到身上受了父亲的抚摩，严肃和慈爱交织着的抚摩似的。
     “是的。”我低低地说。
        他从架上扳下一本书来，版式纸张和《毁灭》一模一样，只是厚一点点，封面上印着两个八分体的字：铁流。
他用竹枝似的手指递给我，小袖管紧包在腕子上：
      “你买这本书吧——这本比那一本好。”
        他是谁？对这样一个平日被人轻视的工人下那样诚恳的劝告？我一进门的时候原就有点疑惑；现在更加疑惑了；虽然猜不出是谁，但自己断定：一定是一个不平常的人。
        我一翻那定价：一元八角！
      “先生，我买不起，我的钱不够……”我的话低得连自己都听不见了，我不知道怎样才好。
        我低了头——头脑里轰隆轰隆的。我不敢看他的脸。我只听见一个声音在问我：
      “一块钱你有没有？一块钱！”
      “有！”我抬起头，顿时恢复了勇气。
      “我卖给你，两本，一块钱。”
        什么？我很惊异地望着他：黄里带白的脸，瘦得教人担心；头上直竖着寸把长的头发。牙黄羽纱的长衫；隶体“一”字似的胡须；左手里捏着一枝黄色烟嘴，安烟的一头已经熏黑了。这时，我忽然记起哪本杂志上的一段访问记——
      “哦！您，您就是——”
        我结结巴巴的，欢喜得快要跳起来了。一定是他！不会错，一定是他！那个名字在我的心里乱蹦，我向四周望了一望，可没有蹦出来。
他微笑，默认地点了点头，好象我心里想着要说的，他已经统统知道了一样。
       这一来不会错了，正是他！站在前进行列最前面的我们的同志，朋友，父亲和师傅！憎恶黑暗有如憎恶魔鬼，把一生的时光完全交给了我们，越老越顽强的战士！我又仔细地看他的脸——瘦！我们这位战士的健康，差不多已完全给没有休息的艰苦工作毁坏了。他带着奖励似的微笑，指着《铁流》对我说明：
     “这书本来可以不要钱的，但是是曹先生的书，现在只收你一块钱本钱；我那一本，是送你的。”
       我费力地从里衫的袋里（公司为防止我们“揩油”，衣衫上一只袋都没有缝）掏出那块带着体温的银元，放到他的手里——他的手多瘦啊！我鼻子里陡然一阵酸，像要哭出来。我恭敬地鞠了一躬，把书塞进帆布袋，背起便走出书店的门。

阅读下列短文，根据短文内容，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项。

Some people think that they have an answer to the problems of automobile crowding and pollution in large cities. Their answer is the bicycle, or bike.

In a great many cities, hundreds of people ride bicycles to work every day. In New York City, some bike riders have even formed a group called “Bike for a Better City”. They claim that if more people rode bicycles to work there would be fewer automobiles in the downtown section of the city and therefore less dirty air from car engines.

For several years this group has been trying to get city government to help bicycle riders. For example, they want the city to paint special lanes—for bicycles only—on some of the main streets, because when bicycle riders must use the same lanes as cars, there may be accidents. “Bike for a Better City” feels that if there were special lanes, more people would use bikes.

    But no bicycle lanes have been painted yet. Not everyone thinks it is a good idea. Taxi drivers don't like the idea—they say it will slow traffic. Some store owners on the main streets don't like the idea—they say that if there is less traffic, they will have less business. And most people live too far from downtown to travel by bike.

The city government has not yet decided what to do. It wants to keep everyone happy. On weekends, Central Park—the largest open place in New York—is closed to cars, and the roads may be used by bicycles only. But “Bike for a Better City” says that this is not enough and keeps fighting to get bicycle lanes downtown. Until that happens, the safest place to bicycle may be in the park.