把函数y=3sin2x的图象向左平移$\frac{\mathrm{\pi }}{6}$个单位长度，得到函数（　　）

关于人口迁移对环境的影响，正确的叙述是             （　　）

    One of the many great lines in the movie Apollo 13 came from Ed Harris, who played NASA Director of Operations, Gene Kranz. The famous line was, “Gentleman, failure is not an option.” He said the words because he had a clear purpose that the three astronauts trapped in space must be sent home safely. The driving force behind their seeking of a solution was motivated by a true purpose.

    Here is the simple principle. If you have a big enough 'why' in life, you will always figure out the 'how.' A person without a purpose in life is like a boat without a rudder, floating aimlessly without a direction and going nowhere. In all walks of life, when referring to someone's success, we often hear the words “focus and determination”. But Merriam Webster defines the word “purpose” as the reason why something is done, a feeling of being determined to achieve an outcome. There are many talented and intelligent people in the world that are unsuccessful because they lack direction. I believe that our life depends on our purpose. Whether you're single or in a team, having a purpose allows you to start, evaluate, and improve your talents or abilities helps you find your path in life and achieve your success finally.

    A friend of mine once told me that the most motivating speech he had ever heard was just three short words. It came from his wife when she said, “Honey I'm pregnant.” He said those few words instantly motivated him because he now had a big “why” in his life, a purpose to work hard to support his family. In fact, when your “why” gets bigger, you get better because you stop holding back and you'll go all out. It's why you often hear about some great people perform superhuman actions when failure is not an option!

笑谈大先生^①

                                                                                                                    陈丹

①鲁迅先生是我几十年来不断想念的一个人。

        ②我喜欢看鲁迅先生的照片，我以为他长得真好看。大先生的相貌就是长得不一样。这张脸非常不买账，非常无所谓，非常酷，又非常慈悲，看上去一脸的清苦、刚直、坦然，骨子里却透着风流与俏皮……他拍照片似乎不做什么表情，就那么对着镜头，似乎在说：怎么样！我就是这样！

        ③所以，鲁迅先生的模样真是非常非常配他，配他的文学，配他的脾气，配他的命运，配他的地位与声名。我们说起“五四”新文学，都承认他是头一块大牌子，可他要是长得不像我们见到的这副样子，你能想象吗？

        ④而且鲁迅先生非得那么矮小，那么瘦弱，穿件长衫，一副无所谓的样子站在那里。他要是也留着于右任、张群那样的长胡子，或者像吴稚晖、沈钧儒那样的光脑袋，古风倒是有古风，毕竟有旧族遗老的气息，不像他。他长得非常的“中国”，同时又非常的“五四”。“五四”中国相较于大清国，何其摩登!可是你比比当年顶摩登的人物胡适之、徐志摩、邵洵美，新潮倒是新潮，毕竟有些“海龟”的派头，也不像他。鲁迅先生的模样既不老派，也非洋派，他长得正好像他自己。

         ⑤在最高意义上，一个人的相貌，便是他的为人。鲁迅先生到底是怎样一个人呢？

         ⑥以我私人的心得，他是百年来中国第一“好玩”的人。我从少年时代阅读鲁迅，就不断发笑，成年后，我知道这发笑有无数秘密的理由，但说不出来，而且幸亏说不出来——这样一种阅读的快乐，在现代中国的作家中，读来读去，读去读来，只有鲁迅能够给予我，鲁迅先生经常在文字里装得“呆头呆脑”，其实很“刁”，鲁迅真正的可爱处，是他的“迭宕自喜”。“迭宕自喜”什么意思呢？也不好说，这句话我们早就遗忘了，我只能粗暴而庸俗地翻译成“好玩”。然而“迭宕自喜”也罢，“好玩”也罢，都属于点到为止的说法。领会者自去领会，不领会，或不愿领会的，便说了也白说。

         ⑦依我之见，历来颇受推崇的那些批判性极强的“革命”文章，多数是鲁迅先生只当好玩写写的，以中国的说法，叫做“游戏文章”，以后现代的说法，就叫做“写作的愉悦”——所谓“游戏”，所谓“愉悦”，直白的说法，可不就是“好玩”？文章的张力，是人格的张力；写作的维度，是人格的维度——激愤，同时放松；深刻，然而精通游戏；挑衅，却随时自嘲；批判，忽而话又说回来……鲁迅作文，就是这样地在玩自己人格的张力与维度。他的语气和风姿，哪里只是峻急锋利这一路？他会忽儿淳厚沉郁，如他的回忆文字；忽儿辛辣顽皮，如中年以后的杂文；忽儿平实郑重，如涉学问或翻译；忽儿苍老精辟，如《故事新编》；忽儿温润出神，如《朝花夕拾》。而有一种异常绝望虚空的况味，几乎隐在他各时期的文字中，尤其是他的序、跋、题记、后记，以上那些反差极大的品质，会出人意料地糅杂在一起，难分难解。

         ⑧总之，我对鲁迅先生的个人评价，一则曰“_____________”，一则曰“_____________”。

【注】①“大先生”系鲁迅家人对他的尊称。本文改写自陈丹青的演讲稿《大先生》。

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a. red                b. brown             c. black             d. blue