一样的橘子味不同

正一口气改完所有的作业,那个累呀,头痛心痛全身痛。我眯缝着眼望窗外洒进来的阳光,神思恍惚,盼望着,盼望着,希望天天都是星期六。正在喘气的当儿,无情的上课音乐铃声传入我耳中。瞟了一眼课堂表,噢,班队课。没办法,谁让我是教师呢?拖着疲惫的身躯,我振作精神,来到了教室的门口。     

你不必追

<正>你不必追,天空的鸟儿。在宁静的清晨,你只需慵懒地躺在床上,就可以听见鸟儿在窗外枝头上天籁般地清唱;你也可以光着脚丫,走在挂满露珠的草尖旁,看鸟儿轻盈地在霞光里扇动翅膀,低低飞,低低飞……你不必追,调皮的春风。在白云朵朵低垂的田野上,你只需带上一只风筝放飞在天空,风会调皮地带着风筝去远方流浪;你也可以站在嫩草青青的山坡上,风会悄悄回到你的身旁,轻轻揉乱你的秀发,让你很美,很美……你不必追,流淌的溪水。在一个温暖的黄昏,你只需坐在河边的石块上,伸出脚     

胫骨骨外露治疗体会

重点介绍了胫骨开放骨折内固定术后胫骨外露患者,通过应用邻近皮（肌）瓣转移术及小隐静脉腓肠神经蒂皮瓣移位术治疗,取得了满意效果。     

小议瓣形穹顶建筑的特征与功能

肋环形球面网壳、施威德勒型球面网壳、联方型球面网壳、凯威特型球面网壳、短程线球面网壳等是目前大跨度空间穹顶网格结构的常用结构形式。球壳的结构拓扑不同,故结构的受力特点也不相同。而它们在形态上的共同特征是圆球面,曲面上任何一点的曲率相等且为正高斯曲率,球面上任何一个节点均满足方程：x2＋y2＋z2=r2。这些经典的球面穹顶网格结构形式经过了国内外近百年数以万计大大小小的工程实践,证明这些结构形式是可靠的、合理的。然而,无论是哪一种类型的球面网壳,从建筑外部形态上看,它们都无法摆脱圆球面特征。本文在总结了传统的穹顶结构特点的基础上,提出并用CAD技术建构了一种新型的空间网格穹顶结构———瓣形穹顶,同样是圆形平面,瓣形穹顶却可变化出各种造型极为丰富的空间形态。文章对瓣形穹顶的几何特征、建筑形态与构成、结构的受力特点和结构布置方案作了系统的研究,这种穹顶结构既可以用于中小跨度结构,也可应用于大跨度的空间穹顶结构。     

瓣结鱼的外部形态特征及性状变动

利用320尾标本进行了可量性状、可数性状的研究，发现各龄组雌鱼的可量性状及头长／眼径的平均值比雄鱼大．且头长／眼径随龄组值增大而增大．弥补了前人对外部形态特征描述的不足．扩大了前人研究的性状范围．     

发现小美好,数学学习更有趣

一个双休日,我们一家人带7岁的儿子去公园看风景。我们的车行驶在高架桥上,两侧,绚丽多彩的月季花把高架桥装扮成了一条“空中花廊”,绚烂无比。高架桥上的鲜花不仅丰富了单调的城市及高架造型,还能帮司机缓解视觉疲劳;长远,角度上来看,还能改善城市的生态环境,真的是体现了“鲜花让生活更美好”的理念。     

麻栗坡兜兰——兜兰属与杓兰属的一个中间类型，兼论兜兰属的地理起源问题

Paphiopedilum malipoense S. C. Chen et Tsi is a very interesting new species with its flower similar to that of Cypripedium, especially section Cypripedium.  It belongs to subgenus Brachypetalum, the most primitive group of Paphiopedilum, but differs from its allied species in hgniva elliptic-lanceolate sepal with cuspidately acuminate apex, rather narrow petals and horizontal lip, which are of common occurrence in many cypripediums, but very rare in paphiopedilums.  Apparently, this is an intermediate form, or a link, between Paphiopedilum and Cypripedium, but it does not seem to arise from hybridization between them, because no Cypripedium has been found wherever Paphiopedilum occurs.       The new species is distributed in southeastern Yunnan of China. In this area, as well as in river valleys of western Yunnan or the Hengduan Mountains, there have been four species of the same genus reported before. As we know, the Hengduan Mountains and their adjacent areas are rich in Cypripedium.  The differentiation of the genus there is remarka- ble.  All five sections it contains occur there and three of them are quite distinctive.  For example, the general appearance of the section Bracleosa is dissimilar to that of any other cypripediums, but closely resembles that of Listera.  It appears that the difference between sect.  Bracteosa of Cypripedium and sect.  Brachypetalum of Paphiopedilum is not neces- sarily wider than that between sect. Bracteosa and sect. Cypripedium of the same genus. Apparently, it is reasonable to consider Paphiopedilum to be an evolutional branch of Cy- pripedium extending into tropical area, with its primitive group (subgenus Brachypetalum) still remaining in its northern fringe area.  This primitive subgenus has eight species, dis- tributed from western Yunnan to the Malay Peninsula.  Five of them, including the inter- mediate and primitive form published here, are found in the hilly land of southeastern Yun- nan and the river valleys of western Yunnan.  All these facts suggest its area of origin: the river valleys of the Hengduan Mountains and the lower hilly land contiguous to the southof them.