阅读理解

    It was once common to regard Britain as a society with class distinction. Each class had unique characteristics.

    In recent years, many writers have begun to speak of the 'decline of class ' and 'classless society ' in Britain. And in modern day consumer society everyone is considered to be middle class.

    But pronouncing the death of class is too early. A recent wide-ranging study of pubic opinion found 90 percent of people still placing themselves in a particular class; 73 percent agreeed that class was still a vital part of British society.; and 52 percent thought there were still sharp class differences. Thus, class may not be culturally and politically obvious, yet it remains an imprtant part of British society. Britain seems to have a love of stratification.

    One unchanging aspect of a British person's class position is accent. The words a person speaks tell her or his class. A study of British accents during the 1970s found that a voice sounding like a BBC newsreader was viewed as the most attractive voice. Most people said this accent sounds 'educated ' and 'soft '. The accents placed at the bottom in this study, on the other hand, were regional(地区的) city accents. These accents were seen as 'common ' and 'ugly '. However, a similar study of British accents in the US turned these results upside down and placed some regional accents as the most attractive and BBC English as the least. This suggests that British attitudes towards accent have deep roots and are based on class prejudice.

    In recent years, however, young upper midder-class people in London, have begun to adopt some regional accents, in order to hide their class origins. This is an indication of class becoming unnoticed. However, the 1995 pop song ' Common People ' puts forward the view that though a middle-class person may ' want to live like common people ' they can never appreciate the reality of a working class life.

通过化学启蒙学习，同学们对组成万物的基本物质有了进一步了解．现有H、N、O、Ca四种元素，请选用其中的元素写出下列物质的化学式：

①空气中含量最多的气体____；

②改良酸性土壤的碱____；

③含氧量最高的氧化物____；

④可作氮肥的盐____：

“掩耳盗铃”是大家熟悉的成语故事．从物理学角度分析，盗贼所犯的错误是：既没有阻止声音的____ ，又没有阻止声音的____ ．

阅读下文,完成下列问题。

孤独的舞者

蒋智润

①秋天,草地上一片寂静,萧瑟冷清。大地上积满了落叶,枯败的叶子蜷缩着,如一张张满是皱纹的脸疲倦地向上张望着。阳光下,小草儿如漂洗过的白银一般,浅黄浅黄的,迎着秋风簌簌作响。四下里静悄悄的,一切都显得无精打采的,凛冽干燥的寒风暗示着这个季节并不属于脆弱的生命。

②然而,在绝望的阴影里似乎总是潜伏着那么一丝愉悦的惊喜。瞧去!不远处一只小小的蝴蝶,一身洁白,半透明的翅膀正不紧不慢地拍打着,宛若一朵飞舞着的雪花,细小的身子忽上忽下回旋跳跃着。一忽儿,轻轻地落在草叶尖上,吻一吻,旋即又飞走了。我想,它的内心该是被某种热切的渴望敦促着吧,孜孜以求,永不懈怠。

③枯黄的草地在我眼里忽然变成一方广阔的舞台,舞台上,这只小小的蝴蝶正孤独地旋着舞演一场独角戏。没有灯光,没有音乐,没有观众,没有掌声,孤独的舞者只是默默地奉献着它最美丽的舞姿,舞姿里有忧伤的美丽,舞姿里有优雅的欢乐。舞啊……舞啊……所有的绝望,所有的欢乐,所有的痛楚都融进这绰约的舞姿里。整个世界停顿下来,默默地注视着,万籁俱寂,周遭的大自然也莞尔笑了。

④一只小小的蝴蝶就这样征服了整个世界。夏日里,会有许许多多这样的蝴蝶,小小的,白白的,舞动在世界的各个角落,成群结队地飞过这个季节,不留下一丝痕迹。当花儿慢慢零落,生机勃勃的绿色也渐渐褪去,只留下孤零零的大地,光秃秃地裸露着,生命俱凋亡,仿佛干涸的生命之滩。夏日,兴旺茂盛的夏日,一天天远去了。这时,从某个不为人知的角落里,孤独的舞者悄然而至,开始享受它那姗姗来迟的短暂的生命。尽管,留给这个“不可理喻”的小生命的,并没有多少舒适与安慰,在这静默的季节里,它仍是这广漠舞台上唯一的主角。不知这小东西是否明白“美好东西的获得往往要做出巨大的牺牲”。代价的确是巨大的,秋天来临,日子一天天过去,寒冷一天天加剧,这一天天加剧的寒冷会无情地吞噬蝴蝶的生命。然而,重要的并不是生命的长度,而是其价值。

⑤不要怕在人生的舞台上做一个孤独的舞者!有多少人,在各自的生活中始终扮演着平庸卑微的角色,却从来没有拥有过自己的人生舞台?又有多少人,随波逐流,将自己独特的个性淹没在茫茫人海?舞步回旋,陌陌前路,何处蔷薇?而在世间的某个角落,一个含苞欲放的花骨朵儿正默默地等待着属于她的那只蝴蝶。有一天,他们相遇,娇嫩的花骨朵儿便张开她的怀抱热情地迎接那久久等待的客人旋着舞步缓缓而来。

(选自《读者》)