阅读理解。

    一天，一个贫穷的小男孩为了攒够学费正挨家挨户地推销商品，劳累了一天的他此时感到十分饥饿，但摸遍全身，却只有一角钱。怎么办呢？他决定向一户人家讨口饭吃。当一位美丽的年轻女子打开门的时候，他却不知所措了，他没有要饭，只乞求给口水喝。这位女子看到他很饥饿的样子，就拿了一大杯牛奶给他。男孩慢慢喝完牛奶，问道：“我应该付多少钱？”年轻女子回答道：“一分钱也不用付。妈妈教导我们，施以爱心，不图回报。”男孩说：“那么，就请接受我由衷的感谢吧！”说完男孩离开了这户人家。此时，他不仅感到自己浑身是劲儿，而且还看到上帝正朝他点头微笑，那种男子汉的豪气像山洪一样进发出来。

    其实，男孩本是打算退学的。

    多年之后，那位年轻女子得了一种罕见的重病，当地的医生对此束手无策。最后，她被转到大城市医治，由专家会诊治疗。当年的那个小男孩如今已是大名鼎鼎的霍华德·凯利医生了，他也参与了医治方案的制定。当看到病历上所写的病人住址时，一个奇怪的念头霎时划过他的脑际。他马上起身直奔病房。

    来到病房，凯利医生一眼就认出床上躺着的病人就是那位曾帮助过他的恩人。他回到自己的办公室，决心竭尽所能来治好恩人的病。从那天起，他就特别关照这个病人。经过艰辛努力，手术成功了。凯利医生要求医院把医药费通知单送到他那里，在通知单的旁边，他签了字。当医药费通知单送到这位特殊的病人手中时，她不敢看，因为她确信，治病的费用将会让她一贫如洗。最后她还是鼓起勇气，翻开了医药费通知单，旁边的那行小字引起了她的注意，她不禁轻声读了起来：

    “医药费——一满杯牛奶”

    霍华德·凯利医生

    喜悦的泪水立刻从女病人的眼中夺眶而出。

2017年中央经济工作会议特别强调了要着力振兴实体经济，这预示着2017年以至未来一段时间内，着力振兴实体经济将是宏观调控的重要内容。振兴实体经济需要进一步降低实体经济企业成本，下列降低实体经济企业成本的调控措施对应正确的是（  ）

①降低企业融资成本——全面推开营改增试点、免行政事业性收费

②降低企业人工成本——降低企业职工基本养老保险单位缴费比例

③降低制度性交易成本——实行全国统一的市场准入负面清单制度

④降低企业税费负担——稳妥推进民营银行设立，发展中小金融机构

Look, this is Daming. Point to his leg.

根据短文理解，选择正确答案。

    Disposing (处理) of waste has been a problem since humans started producing it. As more and more people choose to live close together in cities，the waste disposal problem becomes increasingly difficult.

    During the eighteenth century，it was usual for several neighboring towns to get together to select a faraway spot as a dump site. People would transport household rubbish，rotted wood and old possessions to the site. Regularly some of the trash was burned and the rest was buried. The unpleasant sights and smells caused no problem because nobody lived close by. Factories and some other industrial sites also had waste to be disposed of. Those located on rivers often just poured the unwanted remains into the water. Others built huge burners with chimneys to deal with the problem.

    Several facts make these choices unacceptable to modern society. The first problem is space. Dumps(垃圾场)， are most needed in heavily populated areas. Such areas rarely have empty land suitable. Farm areas are refusing to accept rubbish from elsewhere，cheap land in major city areas to dispose wastes is nonexistent(不存在的). Awareness of pollution dangers has resulted in more strict rules of waste disposal. Pollution of rivers，ground water，land and air is a price people can no longer pay to get rid of waste. The amount of waste，however， continues to grow.

    Recycling efforts have become commonplace，and many towns require their people to take part. Even the most efficient recycling programs，however，can hope to deal with only about 50 percent of a city's reusable waste，so more people should be involved in recycling programs.