题干

小明用一张长32厘米,宽20厘米的长方形纸,最多能剪(  )个半径是2厘米的圆形纸片.

A:50

B:40

C:160

上一题 下一题 0.0难度 选择题 更新时间:2014-11-10 07:51:08

答案(点此获取答案解析)

B

同类题3

论述类文本阅读

    孔子所处的春秋时代,正值“富者田连阡陌,贫者亡立锥之地”。基于对这一现象的担忧,为了维护社会安定,巩固封建统治,孔子提出了如下思想:“丘也闻有国有家者,不患寡而患不均,不患贫而患不安。盖均无贫,和无寡,安无倾。”(《论语·季氏》)一些人把“寡”解为土地财产少当是误读,所谓“寡”类似于老子“小国寡民”中的“寡民”。孔子的“贫”是指土地和财产少。孔子的“均”应有两解:一是“平均”,如((荀子·君道》:“以礼分施,均编而不偏”;二是“公平”,相当于《管子·形势》所言“天公平而无私,故美恶莫不覆;地公平而无私,故小大莫不载。”

    这段话经常被当作儒家宣传平均主义的经典表达加以批判。有的学者指出,社会财富分配的公正合理,确实是社会稳定的前提之一,但孔子“患不均”之正确,并不能证明“不患贫”之合理;“均无贫”不合事实,“不均才贫”更不合逻辑;“均”是分配形式,“贫”是财富多少,财富分配之均与不均,与财富之多少没有关系。“不患贫”是危险的,因为“贫”正是“不安”的首要原因;物贫则人争,争则不安;人所争者,正是这不足之物。“均无贫”彻底的没逻辑,其极端形式是人人都是零,也就不是贫;而人人都是零,均是绝对均了,但贫还是贫。

    这番言论虽不乏深刻,但存在诸多误解。不能脱离特定的语境加以解释。要知道,孔子这段话是针对季康子掌权者之流通过对外战争攻伐等不义手段掠夺土地和人口而讲的,不是泛泛而论。他分别把“均”、“和”、“安”和“贫”、“寡”、“倾”当作两种价值,“不患寡而患不均,不患贫而患不安”表面上看是只追求平均、安定而排斥土地和人口的增加,其实不然,他不过是强调通过采用“均”、“和”、“安”的手段和途径达到解决“贫”、“寡”、“倾”的问题。总之,是利用“均”、“和”、“安”的工具理性达到无贫、无寡和无倾的价值理性目的。“均”作为分配形式同“贫”并非完全没有关系,它在一定程度上影响财富的生产和不同人所占有的财富多少。“均无贫”是说“均无极贫”,绝对平均会致贫,但相对平均却可以防止极端贫困、防止两极分化。其实,从另外意义上说,孔子又何尝不“患贫”、“患寡”呢,他对足食、足兵、民信的肯定,对庶、富、教的赞许,就是最好的说明。“贫”确实是“不安”的重要原因,但历史表明“不均”也是“不安”的根源。就像有的学者所指出的那样:“均贫富,并不是绝对的平均主义。在文化分子特别是儒家的心目中,它不过是相对的平均思想,是协调贫富差距,使之保持在适当限度之意。”(封祖盛、林英南:《开放与封闭》)一定的贫富差距在私有等级社会是必要和必然,只是孔子在肯定使各个等级的财富与其身份地位相一致、强调等级分配的同时,坚决反对过度贫富差距。当季康子试图借改革税赋制度以聚敛更多财富时,孔子说:“季氏富于周公,而求也为之聚敛而附益之。子曰:‘非吾徒也!小子鸣鼓而攻之可也。(《论语·先进》)孔子讲季康子比王朝的周公富有,而冉求还替他搜刮、聚积增加他的财富;冉求不是我的门徒了!你们大张旗鼓地去声讨他好了。

(节编自涂可国《也谈儒家的财富观》)

同类题5

阅读下列短文,从下面每小题的A、B、C、D四个选项中选出最佳选项。

    Is there intelligent (有智力的) life on other planets? For years, scientists said "no" or "we don't know". But today this is changing. Seth Shostak and Alexandra Barnett are astronomers (天文学家). They believe intelligent life exists somewhere in the universe. They also think we will soon contact these beings.

    Why do Shostak and Barnett think intelligent life exists on other planets? The first reason is time. Scientists believe the universe is about 12 billion years old. "This is long enough for other planets to have intelligent life," say Shostak and Barnett. The second reason is size—the universe is huge. "Tools like the Hubble Telescope (哈勃望远镜) have shown that there are at least 100 billion galaxies," says Shostak. "And our galaxy, the Milky Way, has at least 100 billion stars. Some planets going around these stars might be similar to Earth."

    In the past, it was hard to look for signs of intelligent life in the universe. But now, powerful telescopes (高倍望远镜) allow scientists to discover smaller planets—the size of Mars or Earth—in other solar systems. These planets might have intelligent life.

    Have beings from space already visited Earth? "Probably not," says Shostak. "It's a long way away. However, intelligent beings may contact us in other ways, such as radio signals. They may be trying to communicate with us now, but we don't have the right tools to receive their messages. However, this is changing. By 2025, we could make contact with other life forms in our universe and we might help each other."