题干

如图三种血管分别表示的是(  )

A:静脉、动脉、毛细血管

B:毛细血管、静脉、动脉

C:静脉、毛细血管、动脉

D:动脉、静脉、毛细血管

上一题 下一题 0.0难度 选择题 更新时间:2010-10-20 02:03:09

答案(点此获取答案解析)

D

同类题2

阅读材料,回答问题

    经过改革开放30多年的飞速发展,中国不仅成为世界第二大经济体,而且进入了中等偏上收入国家行列。然而,在长期形成的粗放式发展惯性作用下,一些重化工行业和一般制造业形成了严重的产能过剩,不仅加大了经济下行压力,而且成为突破“中等收入陷阱”过程中的重负。此外,在环境保护、资源节约、公共服务、社会公平等领域,也存在着很多短板。面对中国经济当下的困局,仅从需求侧着手已经很难有所突破,供给侧与需求侧双侧入手改革,增加有效供给的中长期视野的宏观调控,才是结构性改革。

    供给侧结构性改革,就是从提高供给质量出发,用改革的办法推进结构调整,矫正要素配置扭曲,扩大有效供给,提高供给结构对需求变化的适应性和灵活性,提高全要素生产率,更好满足广大人民群众的需要,促进经济社会持续健康发展。

    在2016年1月26日召开的中央财经领导小组第十二次会议上,******强调,供给侧结构性改革的根本目的是提高社会生产力水平,落实好以人民为中心的发展思想。要把思想认识统一到党中央关于推进供给侧结构性改革的决策部署上来。去产能、去库存、去杠杆、降成本、补短板是工作重点,关系到供给侧结构性改革的开局、关系到“十三五”的开局。各地区各部门要坚定信心、坚决行动,抓紧抓好抓实,切实取得实效。

结合材料,运用经济生活相关知识,请分析供给侧结构性改革的经济学依据。

同类题3

    Happiness is important for everyone. Most people want to be happy but few know how to find happiness. Money and success don't bring lasting happiness. Happiness depends on ourselves. In other words, we make our own happiness.
    Some people believe that if they are wealthy, they will be able to do anything they want, which means happiness. On the other hand, some people believe that holding a high position in the government is happiness. In this way, you have not only money, but also many other things which can't be bought by money. However, other people believe that having lots of money is not happiness, nor is holding a high position in the government. These people value(重视) their beliefs, or their intelligence, or their health. They think these can make them happy.
    Here are a few ways to help you be happier.
    The first secret of happiness is to enjoy the simple things in life. Too often, we spend so much time thinking about the future, for example, getting into college or getting a good job, that we don't enjoy the present. You should enjoy life's simple pleasures, such as reading a good book, listening to your favorite music, or spending time with close friends. People who have close friends usually enjoy happier and healthier lives.
    The second secret of happiness is to be active. Many people go dancing or play sports. People can forget about their problems and only think about the activities.
    Finally, many people find happiness in helping others. According to studies, people feel good when they volunteer their time to do many meaningful things for other people. If you want to feel happier, do something nice for someone. You can help a friend with his or her studies, go shopping to get food for an old neighbor, or simply help around the house.
    Now maybe you know how to find happiness!