题干

向边长为2的正方形中随机撒一粒豆子,则豆子落在正方形的内切圆的概率是(  )

A:

B:

C:

D:

上一题 下一题 0.0难度 选择题 更新时间:2017-10-05 12:01:57

答案(点此获取答案解析)

C

同类题1

阅读下面文字,完成后面各题。

    乡贤,旧时又称乡绅,是指在本乡本土知书达理、才能出众、办事公道、德高望重之人。在传统中国,乡村的基层建设、社会秩序和民风教化等,主要由每个村落和地方的乡贤担纲。这些乡贤或以学问文章、或以清明善政、或以道德品行等赢得乡邑百姓的高度认同和效仿,从而形成植根乡野、兴盛基层的乡贤文化。

    乡贤文化大体属于地域文化,在不同地区有不同特色,共同演绎了中华优秀传统文化的博大精深和绚丽多彩。乡贤文化经过千百年的传承和积累,在乡村治理、文明教化、谋利桑梓等方面形成了丰富的经验和深厚的传统,对中国社会的基层稳定、中华文明的赓续传扬具有举足轻重的意义。乡贤文化的核心和基础是乡贤,乡贤的流失,必然导致乡贤文化的式微。

    传统乡贤文化的兴盛,在于乡绅在传统基层社会具有广阔的用武之地。在古代社会,中国历代统治者对基层社会控制相对较松,不少朝代是县以下不设治,也就是人们通常所说的“皇权不下县”。县以下的广大区域没有国家权力组织,主要依靠乡绅发挥作用来有效填补国家权力的空白。地方乡绅在国家行政体制之外代替或配合官府处理大量社会公共管理事务。这些事务涉及诸多内容,如基础设施建设、救灾、教育、维护社会秩序等。清代实行较为严密的保甲制度,官府在基层推行保甲法时,常常不得不借助乡绅及宗族组织完成,多半“责成本乡绅士,依照条法,实力举行”。由此可见乡绅对基层社会控制力之强和乡绅的作用之大。因此,在传统中国社会,乡绅在国家政权与基层民众之间扮演着协调两者矛盾、促进双方良性互动、维护社会平稳发展的关键角色。

    传统乡贤文化蔚为壮观,还有另一关键原因,这就是古代官场的“告老还乡”制度,保证了乡贤人才的绵绵瓜瓞,代不乏人。

    早在春秋战国时期,便有官吏退休的“退而致仕”“还禄位于君”的记载。唐宋以降,官吏退休还乡渐成规矩,至明清时期,已成雷打不动的制度。官吏退职返乡,积极意义十分明显。其一,进则为官、退则为绅的返乡模式实现了人才资源从乡村流出到返回乡村的良性循环,使社会人才分布结构趋于合理,有利于整个社会可持续发展。其二,官吏回乡后为建设故里出力,治理乡村、造福桑梓,崇文兴学、教化一方,保障了乡村经济、政治、文化等各项事业兴旺发达,也使乡贤文化在乡村代代相传。其三,退职官员返乡,将毕生所学和积累的经验用于建设家乡,在维系乡村和谐稳定的同时,也促进了城市与乡村的平衡发展。

    如今,各级领导干部退职后在城市养老的多,通过各种关系设法牟利者也不少,告老还乡建设乡村者少。如今的乡村再也无法像过去那样,实现人才从流出到流入的良性循环。当“告老还乡”被摈弃以后,乡贤的重要来源枯鱼涸辙,乡贤文化的凋敝也就在所难免了。

    反观当今,国家在县级政府以下设有乡(镇)政府、村民委员会、村民小组三级权力组织,对基层社会的掌控基本做到全覆盖。由于国家从组织机构上编织了较为完善的乡村管理系统,今天的乡贤很难像过去的乡绅一样,在乡村治理方面发挥重要作用。这无疑是乡贤文化衰落的又一不可忽视的因素。

(选自钱念孙《乡贤文化为什么与我们渐行渐远》,有删改)

同类题3

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    The first time I played basketball, I was 8 years old. I played in my community where I grew up, and there were never referees(裁判). I didn't know the rules. ____ I always wanted to stay after the game and continue to play basketball.

    I grew up in a single-parent home with no father around, no brothers or sisters. ____ Sports gave me an opportunity to forget all that I had gone through during my childhood.

    ____ One was the trust of the guys who were playing. It was passing the ball to friends and seeing their joy after making a basket. The other was competition, which is different from opposition. When I was in fifth grade, I wanted to be in the NBA.____

    When I was 14, my coach would tell others that I was the best kid he had ever seen, and that I had NBA potential(潜力). From then on, I got bigger and bigger. I loved the game more and more. I had the greatest time of my life playing basketball in high school.

    ____ There are no shortcuts(捷径). My teammates and I come from different walks of life and in different shapes and sizes, but we all put in the time. We do that for the joy of being out on the basketball court. And we've achieved a lot in the field.

A. It's a natural habit.

B. But I knew I loved it.

C. We always had difficulty paying our bills.

D. I thought, I guess I'm doing the right thing.

E. You have to dream something to make it a reality.

F. I fell in love with basketball mainly for two reasons.

G. In basketball, you get back what you give to the game.