题干

项式(
x
2
2
x
10的展开式中, x 项的系数是(   )

A:152

B:﹣ 152

C:15

D:﹣15

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答案(点此获取答案解析)

B

同类题4

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灵魂曝光

美国马克·吐温

    ①一座叫赫德莱堡的小镇,这个镇里的人向来以诚实著称,镇里有位德高望重的理查兹先生。一天,一个陌生人背着一只大口袋来到他家,把袋子放在地上说:“请您把它藏好,袋子上系着一张字条,一切都在上面写着。”说完,陌生人就走了。理查兹忙解下字条,上面写着:我以前是一个奸商,有一回,因破产走投无路,途经贵镇时,有位好心人给了我二十块钱。后来我靠那二十块钱发了大财。我现在想报答那个好心人,可我不知道他是谁,我只记得他曾对我说过的一句话,麻烦您用登报的方式帮我寻找,谁要是说得出那句话的内容,谁就是我的恩人,袋里的金币就归他所有。我把写有那句话的纸条,装在袋中的一个信封里,一个月以后的星期五请贵镇的柏杰士牧师在镇公所进行公证。

    ②看完,理查兹脑子里闪过一个念,但这个念头只在他脑子里一闪而过,最终他还是决定去找本镇报馆的主编柯克斯。第二天,报纸出来了,整个小镇都轰动了。

    ③这天,邮递员给理查兹夫妇送来一封信。信上写着:那个给钱的人是已经去世的固德逊,当时他说的是:“你不是一个坏人,快去悔过自新吧。”理查兹夫妇兴奋地紧紧拥抱在一起。

    ④一个月后的星期五终于到了。一大早,镇公所里坐满了人,柏杰士牧师拆开袋里的那封信,读道:“那句话是——你不是一个坏人,快去悔过自新吧。”接着柏杰士告诉大家,他收到十几封信,每封信上都写着:“你不是一个坏人,快去悔过自新吧。”接着他开始一封一封念信。这些信里有银行家宾克顿、报馆主编柯克斯、造币厂老板哈克尼斯等,都是镇里赫赫有名的人物。人们终于明白,原来这是一场贪财的闹剧。坐在场予里的理查兹紧张极了,“上帝呀,下一封该轮到我了!”可是,柏杰士在口袋里摸了半天,说:“没有信了。”理查兹夫妇听到这句话愣住了。

    ⑤柏杰士从钱袋里捧出一把金币看了看,突然惊讶地说:“上帝啊!这全是镀黄的铅饼!这里还有一张字条。”接着,他展开字条,念道:“赫德莱堡公民,其实根本没有什么二十块钱和金币。有一天,我路过你们这里,受到了你们的欺辱。因此我故意设了这个圈套,让你们镇里最有名望的人都出丑。”柏杰士不由地低下头,说:“他赢了,他的那袋假金币把我们全镇的人都打败了!

    ⑥“不,有一个人他没有被打败,那就是理查兹先生。”说话的人话音刚落,赫德莱堡的人一起高叫起来:“理查兹万岁,万岁理查兹!”理查兹得到了这样的荣誉后,反而睡不好觉,吃不下饭。一天,柏杰士托人送来一封信。理查兹赶忙关上房门,拆开信一看:

    那一天我是有意救你,你的信我并没有丢失。我之所以这么做,是为了报答你曾经挽救过我的名誉。我是一个知恩图报的人。

    ⑦理查兹看完这封信,顿觉天旋地转,他想,完了,自己的把柄落在了柏杰士的手里。从此,理查兹时刻经受着悔恨和害怕事情败露的双重折磨,不久就患病去世了。

同类题5

阅读理解

    62-year-old Zhang Jianxing has been searching the ancient forests of the Shennongjia National Nature Reserve for over two decades.

    Jianxing began living in the 3,200-square-kilometer mountain range in 1994, after becoming fascinated with the Yeren(also Chinese Wild Man), a 6-foot-tall humanoid creature covered in thick red-brown fur. References of the so-called Chinese Wild Man date back to the Zhou Dynasty in the works of classical Qu Yuan.

    German Man Creates World‘s Heaviest Bicycle

    For 10 months out of every year, for the last 22 years, Jianxing has been living deep in the Shennongjia National Nature Reserve, hoping to meet the Yeren. Dressed in military gear and armed with a camera, he constantly looks for clues of the creature, living off the land and sleeping in abandoned homes and empty caves. To him, the Yeren is more than just an old myth, it's a branch of scince, one that he has been studying for a very long time.

    Jianxing claims he has collected enough evidence of the Wild Man's existence---over 100 hair samples and 3,000 photos of large footprints---adding that he even came close to seeing it for himself no less than 19 times. And he is not alone in his beliefs. The Wild Man Research Association----yes, there is such a thing---records show reports of Yeren encounters from over 400 locals.

    But with no concrete evidence to prove the existence of the Wild Man, most scientists regard it as nothing more than a legend.

Jianxing also added that the local government in Hubei is relying on the Yeren to boost its tourism revenues. In 2012, the Shennongjia Nature Reserve signed an agreement with Beijing to promote holidays for Yeren hunters.