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已知一个公园的形状如图所示,现有3种不同的植物要种在此公园的A,B,C,D,E这五个区域内,要求有公共边界的两块相邻区域种不同的植物,则不同的种法共有____种.

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    When I was a little kid, one of my favorite things to do was going to the zoo. I have recently heard that there are debates as to whether elephants should live in zoos or should they wander around free. My position is that elephants should live in zoos for people to see.

    Many experts say that elephants have a good life living in zoos. There are 78 zoos that exhibit elephants. Most zoos are taking the necessary steps to make living conditions better for the elephants. They are doing things such as replacing hard floors with sand or dirt. This makes it easier for them to wander around. Zoos are also expanding their elephant house to give the large animals more room to go around.

    Zoos also protect endangered species. According to the World Wildlife Fund, in 2014 the total population of African elephants was around 700,000, and the Asian elephant population was around 32,000. The Asian elephants are on a path to dying out. Without zoos, they all are likely to disappear within our lifetime. The National Zoo plans to spend millions of dollars on a new Asian elephant habitat. That way, they can start their own group if the Asian elephants are gone.

    There are people who want zoos to empty all of their elephant displays. If they decide to do so, it would take the chance to see elephants up close away from people. That could change the public's favorable opinion of elephants. National Zoo director John Berry says that allowing visitors to experience the elephants up close encourages people to care about endangered species.  During one of my visits to the zoo, it was a very hot day. I was sweating a lot. Big Ben, the largest elephant on display, walked up to me and gently squirted(喷) my face with water from his trunk. Everyone was amazed at what he did. That was a very nice thing for Big Ben to do. I am sure that elephants are the nicest animals on earth. I wish all zoos would keep their elephant displays open to the public. I want all my friends to be able to experience what I did with Big Ben.

    I feel zoos should follow all the necessary steps to keep elephants in zoos. I would raise money at my school if I thought it would help to keep elephants in zoos.

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阅读下面的文言文,完成下列小题。

    王仁镐,邢州龙冈人。后唐明宗镇邢台,署为牙校,即位,擢为作坊副使,累迁西上阁门使。清泰中,改右领军卫将军。晋天福中,青州杨光远将图不轨,以仁镐为节度副使,伺其动静。历二年,或谮仁镐于朝,改护国军行军司马。仁镐至河中数月,光远反书闻。汉乾祐中,历昭义、天雄二军节度副使。

    周祖镇邺,表仁镐为副留守。及起兵,仁镐预其谋。周祖即位,仁镐为王峻所忌,出为唐州刺史,迁棣州团练使,入为右卫大将军,充宣徽北院使兼枢密副使。显德初,出为永兴军节度使。世宗嗣位,移河中。会殿中丞上官瓒使河中还,言河中民多匿田租,遂遣瓒按视均定。百姓苦之,多逃亡他郡,仁镐抗论其事,乃止。丁继母忧,去官。

    五年,拜安国军节度,制曰:“眷惟襄国,实卿故乡。分予龙节之权,成尔锦衣之美。”郡民扶老携幼,迎于境上,有献锦袍者四,仁镐皆重衣之,厚酬以金帛。视事翌日省其父祖之墓周视松槚涕泗呜咽谓所亲曰仲由以为不如负米之乐信矣时人美之。郡有群盗,仁镐遣使遗以束帛,谕之,悉遁去,不复为盗。恭帝嗣位,移山南东道节度。

    宋初,加检校太师。建隆二年,以疾召还,次唐州,卒于传舍,年六十九。

    仁镐性端谨俭约,崇信释氏,所得俸禄,多奉佛饭僧,每晨诵佛经五卷,或至日旰方出视事从事刘谦责仁镐曰:“公贵为藩侯,不能勤恤百姓,孜孜事佛,何也?”仁镐敛容逊谢,无愠色。当时称其长者。

(选自《宋史》,有删改)