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1.
《大科技．科学之谜》2013,(7):63
1.在球面几何中,三角形内角和—A.等于180度B.小于180度C.大于180度D.可能大于,也可能小于180度2.下列关于献血的说法,正确的是—A.献血会对身体造成很大伤害B.献血对于肥胖症患者有一定好处C.献血不分老幼,都可以献D.献血对于心脏病患者有一定好处3.神奇的等离子推进器的燃料其实是—A.液态氢B.电C.太阳能D.惰性气体氙4.下列关于云计算的说法,错误的是—A.云计算不需要服务器B.云计算需要互联网支持C.云计算节省了电费D.云计算提高了设备使 相似文献
2.
在为编写《Flora of China》伞形科而进行的修订工作中，提出了11个新组合，即矮小丝瓣芹Acronema minus (M. F. Watson) M. F. Watson & Z. H. Pan, 短柄丝瓣芹A. brevipedicellatum Z. H. Pan & M. F. Watson, 川西当归Angelica sinensis var. wilsonii (H. Wolff) Z. H. Pan & M. F. Watson, 云南细裂芹Harrysmithia franchetii (M. Hiroe) M. L. Sheh, 钝叶独活Heracleum candicans var. obtusifolium (Wall. ex DC.) F. T. Pu & M. F. Watson, 中华天胡荽Hydrocotyle hookeri ssp. chinensis (Dunn ex R. H. Shan & S. L. Liou) M. F. Watson & M. L. Sheh, 普渡天胡荽H. hookeri ssp. handelii (H. Wolff) M. F. Watson & M. L. Sheh, 锐棱岩风Libanotis grubovii (V. M. Vinogradova) M. L. Sheh & M. F. Watson, 美脉藁本Ligusticum likiangense (H. Wolff) F. T. Pu & M. F. Watson和线叶藁本L. nematophyllum (Pimenov & Kljuykov) F. T. Pu & M. F. Watson, 无管藁本L. nullivittatum (K. T. Fu) F. T. Pu & M. F. Watson和二色棱子芹Pleurospermum bicolor (Franch.) C. Norman ex Z. H. Pan & M. F. Watson.; 发现了1个新种，即短柄丝瓣芹。此外，还为Pleurospermum govanianum var. bicolor Franch.指定了后选模式。 相似文献
3.
正本期封面是意大利画家塞巴斯蒂安(Sebastiano del Piombo,c.1485—1547)的一幅男子肖像,现藏美国大都会博物馆。画中人头顶两旁的背景中,可以辨认出的两行金字是:HAEC.EST.EFFIGIES.LIGVRIS.MIRANDA.COLVMBI.ANTIPODVM.PRIMVS/RATE.QVI.PENETRAVIT.IN.ORBEM.1519,翻译出来为:"这是利古里亚人哥伦布令人赞叹的画像,他首次驾船驶入地球的对跖点,1519"。许多人认为这就是伟大航海家哥伦布(Christopher Columbus,c.1451—1506)的画像,COLVMBI是"哥伦布"这个姓氏众多异体中的一种;利古里亚在意大利西北部,南濒热那亚湾。许多关于哥伦布及地理大发现的书籍也都采用 相似文献
4.
描述了贵州卷柏属一新种,即习水卷柏Selaginella xishuiensis G. Q. Gou & P. S. Wang。新种与蔓出卷柏S. davidii Franch.在体态和大小方面相近,但叶缘具睫状毛而不同;新种在体态上也与地卷柏S. prostrata H. S. Kung相似,但孢子叶一型而不同。 相似文献
5.
灵台剖面石英颗粒表面形态初步研究及其古气候意义 总被引：5，自引：0，他引：5
侯圣山 《中国科学院研究生院学报》2002,19(1):59-68
通过研究甘肃灵台 7.0MaB.P.以来的红黏土 黄土剖面中石英颗粒的形状和表面形态特征,并和标准现代环境中沉积物的特征相对比,得到了红黏土与其上的黄土有较为类似成因的结论.由于晚新生代青藏高原的隆升,高原不断被剥蚀,产生大量的碎屑物质.经过各种地表营力的作用,碎屑物质被带到附近的干旱盆地中,后来才由风力搬运到黄土高原沉积下来.灵台剖面的石英颗粒表面形态揭示了约 7.0MaB.P.以来 4次组合的变化,分别发生在约 4 2～5 0MaB.P.,约 3.6MaB.P.,约 2.6MaB.P.和约 0.9MaB.P.,推测可能与青藏高原约 7.0MaB.P.以来经历的阶段性隆升有关. 相似文献
6.
在国家自然科学基金及其他基础项目的支持下,近几年我国无机化学基础研究取得突出进展,成果累累,一批中青年专家脱颖而出.有的专家在科研成果转化、产业化方面作出了突出成绩;有的专家在国际高水平的专业杂志Science,Accounts of Chemical Reserch , Angew. Chem. Int. Ed., J. Am. Chem.Soc.上发表了一批有影响的科学论文. 相似文献
7.
朱格麟 《中国科学院研究生院学报》1988,26(4):299-300
Baolia Kung et G. L. Chu was established on the basis of B. bracteata Kung et G.
L. Chu described in 1978 from Diebu County on the border between Gansu and Sichuan provin-
ces. It is placed in the tribe Chenopodieae in 《Flora Reipulicae Popularis Sincae》, but
considering its flowers with a bract and 2 bracteoles it is betwter transferred to the tribe Polv-
cenmeae. So far the tribe Polycnemeae contains 4 genera in total, i.e. Nitrophila S. Wats. with
4 species, distributed in Southwestern US, Mexico and Argentina, Hemichroa R. Br. with
3 species all in Australia, Polycnemum Dumort. with 4 species in Europe, Mediterranean,
Middle Asia to Siberia, Baolia Kung et G. L. Chu with 1 species, occurring in central China
with a very limited area. 相似文献
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9.
朱洗与无政府主义为生物学家朱洗传记补遗 总被引：1，自引：1，他引：0
朱洗(1900-1962),浙江临海人.当代著名生物学家、科普作家.1920年参加留法勤工俭学,开始接触无政府主义.1931年获法国国家博士学位.1932年回国,从此研究、写作不辍.在科研方面,以研究孤雌生殖闻名中外.在科普方面,其"现代生物学丛书"至今无人能出其右.中国大陆有关朱洗的传记,以陈阜<朱洗>一书最为完整,但讳言朱洗为无政府主义者.本文为陈阜<朱洗>一书补遗,藉以说明先生的无政府主义思想与中国民族和民主革命的关系,及其身体力行的众多事例.本文指出,朱洗一生奋斗不懈,与其无政府主义信仰有关.本文可补充大陆朱洗研究之不足. 相似文献
10.
专家简介:孙阳,中科院物理所研究员,博士生导师,研究组组长。1974年出生于新疆伊犁,1992年考入中国科技大学,先后获学士和博士学位。2001年至2004年在美国从事博士后研究,2004年入选中国科学院"引进国外杰出人才计划"。已在包括Phys.Rev.Lett.、Appl.Phys.Lett.、Phys.Rev.B等国际著名学术期刊发表SCI收录的研究论文68篇,被他人引 相似文献
11.
马葛勒,原名达尔·拉·马葛勒,纽约格伦湾镊子人公司首席执行官.出身贫寒,自幼靠母亲负债经营一家保龄球馆,勉强度日.好学.从小学到中学,各门功课在班上均名列前茅.有挑战精神,敢冒险,喜独创,大学时代便尝试创办企业,在校园内开办歌舞厅,有"校园企业家"之美称.曾梦想成为电影独立制片人,后涉足迪斯科舞厅,因经营不善,负债累累.以500美元创办镊子人公司,几经波折,从低谷走出,大获成功. 相似文献
12.
在 Windows9x系统中 ,先用记事本 ( Notepad.exe)编写中文输入法源代码文件 ( .txt) ,再用 Imagedit.exe和 Hcw.exe程序分别编辑输入法位图 ( .bmp)文件、图标 ( .ico)文件和帮助文件 ( .hlp) ,然后用 Imegen.exe程序生成自己的中文输入法字库文件 ( .bm)和中文输入法文件 ( .ime) ,并进行安装、使用。 相似文献
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14.
The classical and numerical taxonomy, palynology and the geographical dis-
tribution of the Genus Schizopepon are dealt with in the present paper. Having comme-
nted on various opinions regarding the systematic position of the genus, the present au-
thors consider that C. Jeffrey’s treatment of Schizopepon as a new and monogeneric tri-
be, Schizopeponeae, should be supported.
The gross morphological characters in the genus are assessed from the taxonomic
point of view. Some characters, such as stamens with an elongated connective or not,
different insertions of ovules and various forms of ovaries and fruits, may be used for
distinguishing subgenera.
The pollen grains of all the species were observed under light microscope (LM) and
scanning electron microscope (SEM). The results show that a strong differentiation
has taken place in the pollen of the genus, and in consequence it may be regarded as an
important basis for dividing subgenera and species. Especially it should be pointed out
that degrees of development of colpi and positions of ora are positively correlated with
the external characters used for distinguishing subgenera.
According to the morphological and palynological characters, the genus Schizopepon
may be divided into three subgenera and eight species: 1. Subgenus Schizopepon: 5 spe-
cies, S. bryoniaefolius Maxim., S. monoicus A. M. Lu et Z. Y. Zhang, S. dioicus Cogn.,
S. longipes Gagnep. and S. macranthus Hand.-Mazz.; 2. Subgenus Rhynchocarpos A. M.
Lu et Z. Y. Zhang: 1 species, S. bomiensis A. M. Lu et Z. Y. Zhang; 3. Subgenus Neoschi-
zopepon A. M. Lu et Z. Y. Zhang: 2 species, S. bicirrhosus (C. B. Clarke) C. Jeffrey
and S. xizangensis A. M. Lu et Z. Y. Zhang.
The 8 OTU’s including all the species of this genus and 31 characters, of which 16 are morphological characters and 15 palynological characters, were used in the numerical taxonomic treatment. After standardization of characters, the correlation and distance matrices were computed. The correlation matrices are made to test the various clustering methods. At last, the UPGMA clustering method was selected and its result
is shown in the form of phenogram. The result of numerical analysis is similar to that of the classical classification.
Schizopepon Maxim. is a genus of East Asia-Himalayan distribution. China has all 8 species and 2 varieties, of which 6 species are endemic. Based on the statistics of spedies number, the distribution centre of the genus is considered to be in the Hengduan Mountains (Yangtze-Mekong-Salwin water divides) and the adjacent areas of the southwest China. 相似文献
15.
Prof. CHEN Xiaoya plant physiologist has been appointed the executive vice president of the Shanghai Institutes for Biological Sciences 《中国科学院院刊(英文版)》2008,22(1):63-63
Prof. CHEN Xiaoya, plant physiologist, has been appointed the executive vice president of the Shanghai Institutes for Biological Sciences （SIBS）. The announcement was made on 11 November, 2007. Prof. Chen is to succeed Prof. PEI Gang, who has assumed the presidency of the prestigious Tong Ji University in Shanghai. 相似文献
16.
铁线莲属研究随记(Ⅱ) 总被引：1，自引：0，他引：1
王文采 《中国科学院研究生院学报》2000,38(5):401-429
(1) The systematic positions of Clematis potaninii Maxim., C . heynei Rau, C. tri-
chotoma Nakai, C. apiculata Hook. f. &; Thoms, C. theobromina Dunn, C. sigensis Engler,
C. hedysarifolia DC., and C. dissecta Baker, and the specific status of C. trifida Hook, C.
pimpinellifolia Hook., C. oligophylla Hook., and Clematopsis lineariloba Hutch. are discussed;
(2) New classifications for Clematis parviloba Gardn. &; Champ., C. puberula Hook. f. &;
Thoms., and sect. Naraveliopsis Hand.-Mazz. are provided; (3) Clematis subsect. Potaninianae
M. Johnson, C. heynei M. Johnson, C. petelotii Gagnep. and some other names are reduced to
synonymy; (4) Two subsections, 4 series, 4 species, and 4 varieties are described as new; (5)
Four new ranks and 4 new combinations are made.
Key words Clematis;Taxonomical problems;New taxa;New ranks;New combinations
摘要 (1)对铁线链属以下诸种Clematis potaninii Maxim., C．heynei Rau,C．trichotoma Nakai,C．apicu-
lata Hook．f.&; Thoms., C．theobromina Dunn,C．hedysarifolia DC．和C．dissecta Baker的系统位置进行了
讨论,提出了新见解;(2)过去一些作者或不承认C．trifida Hook．,C．pimpinellifolia Hook.,C．oligophyl-
la Hook．,和Clematopsis lineariloba Hutch诸种,或进行降级,作为种下分类群处理。本文作者在研究了有
关标本之后认为上述4种有明显区别特征,均应成立;(3)对裂叶铁线莲Clematis parviloba Gardn．&;
Champ．的5个变种,短毛铁线莲C．puberula Hook．f.&; Thoms．的4个变种和丝铁线莲组sect．Naraveli-
opsis Hand.-Mazz．的20个种做出新的分类安排;(4)归并了subsect．Potanimianae W．T．Wang,C．heynei
M．Johnson,C．petelotii Gagnep．以及其他几个学名;(5)描述了2新亚组,4新系,3新种和3新变种;(6)做出了3个新等级,4个新组合。 相似文献
17.
18.
林有润 《中国科学院研究生院学报》1987,25(5):390-392
It is quite unreasonable reducing Elachanthemum Y. Ling et Y. R. Ling into
Stilprolepis Krasch. and it is so wrong idea attributing the achenes and cupuliform corolla (as
a matter of fact, the cupuliform corolla is originally from the Stilpnolepis Krasch., not from
Elachanthemum Y. Ling et Y. R. Ling) of Elachanthemum Y. Ling et Y. R. Ling to “earlier
Development” in the paper published in Act. Phytotax. Sin. 23(6): 470-472. 1985.
In Elachanthemum Y. Ling et Y. R. Ling, bracts of capitula herbaceous, obviously floccose
on the abaxial surface and membranaceous only on the margin, corolla of bisexual florets tubu-
lar, achenes oblique, obovoid, and the exine of pollen grains minutespinulate, but in Stilpnole-
pis Krasch., on the contrary, whole bracts membranaceous, glabrous, corolla of hermaphrodite
florets cupuliform or campanulate, achenes long-clavate or fuciform and the exine of pollen grains remarkably spiny. 相似文献
19.
栽培牡丹一直称为Paeonia suffruticosa Andrews。 在把作丹皮用的栽培牡丹（凤丹）描述为新种P. ostii后,观赏的栽培牡丹仍然被统称为P. suffruticosa。 但在P. suffruticosa复合体内, P. rockii, P. jishanensis, P. qiui 和P. suffruticosa ssp. yinpingmudan 等野生类型相继被描述并得到承认。于是,有人提出了栽培牡丹多元发生的观点,同时也出现了P. suffruticosa “是牡丹组数 相似文献
20.