阅读下面的文字，完成下列小题。

    苏轼，字子瞻，眉州眉山人。生十年，父洵游学四方，母程氏亲授以书，闻古今成败，辄能语其要。程氏读东汉《范滂传》，慨然太息，轼请曰：“轼若为滂，母许之否乎？”程氏曰：“汝能为滂，吾顾不能为滂母邪？”比冠，博通经史。嘉祐二年，试礼部。以《春秋》对义居第一，殿试中乙科。后以书见修，修语梅圣俞曰：“吾当避此人出一头地。”

    丁母忧。五年，调福昌主簿。欧阳修以才识兼茂，荐之秘阁。时新政日下，轼于其间，每因法以便民，民赖以安。知徐州河决曹村泛于梁山泊城将败富民争出避水。轼曰：“富民出，民皆动摇，吾谁与守？吾在是，水决不能败城。”驱使复入。轼诣武卫营，呼卒长曰：“河将害城，事急矣，虽禁军且为我尽力。”卒长曰：“太守犹不避涂潦，吾侪小人，当效命。”雨日夜不止，轼庐于其上，过家不入，使官吏分堵以守，卒全其城。

    徙知湖州，上表以谢。又以事不便民者不敢言，以诗托讽，庶有补于国。御史李定、舒亶、何正臣摭其表语，并媒薛所为诗以为讪谤，逮赴台狱，欲置之死，锻炼久之不决。神宗独怜之，以黄州团练副使安置。轼与田父野老，相从溪山间，筑室于东坡，自号“东坡居士。”

    道过金陵，见王安石，曰：“大兵大狱，汉、唐灭亡之兆。祖宗以仁厚治天下，正欲革此。今西方用兵，连年不解，东南数起大狱，公独无一言以救之乎？”安石曰：“二事皆惠卿启之，安石在外，安敢言？”轼曰：“在朝则言，在外则不言，事君之常礼耳。上所以待公者，非常礼，公所以待上者，岂可以常礼乎？”安石厉声曰：“安石须说。”又曰：“出在安石口，入在子瞻耳。”又曰：“人须是知行一不义，杀一不辜，得天下弗为，乃可。”轼戏曰：“今之君子，争减半年磨勘，虽杀人亦为之。”安石笑而不言。

    仁宗初读轼、辙制策，退而喜曰：“朕今日为子孙得两宰相矣。”神宗尤爱其文，宫中读之，膳进忘食，称为天下奇才。而卒不得大用。

(选自《宋史•苏轼列传》)

黄山是举世闻名的风景名胜区，景区内的黄山松大多分布在海拔800米以上的区域．影响黄山松分布的主要非生物因素是（　　）

    Ever since an accident put him in a wheelchair, Dan has had one dream:1.

    That is why he was 2 to learn about a piece of research that could possibly lead to his 3. But there are two 4. First, the research may take years before it becomes a treatment. And the second is the most 5 of all considerations: money.6by love for Dan, friends worked hard through a series of 7 to raise 20,000 pounds for his future surgery. Dan felt he could really start looking forward to the day when he could turn his 8 into a reality.

    Then he 9 Brecon, a 5-year-old who 10 from cerebral palsy (脑瘫). Dan read about a new surgical operation that could 11 the little boy to walk unaided. But the surgery would 12 more than 60,000 pounds --- money Brecon's parents were having a 13 time raising.

    Dan said, “I'm in pretty much the 14 condition, but it appears that Brecon can 15 walk if he gets his surgery, and I can't right now. So I thought I might as well pass the money on to him. I'm 16 to everyone who has helped me out, but this boy needs it 17 I do at the moment.”

    And so he took this dream out of the bank and 18 it over to Brecon's parents, telling them, “It would make me very happy to see the 19 made to Brecon's life.”

    “I wanted to help someone whose life could get better,” he said. “If I can help someone to walk, I will. Even if it means 20 a dream to do it.”