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1.
《海外英语》2003,(12):1
Youth is not a time of life; it is a state of mind; it is not a matter of rosycheeks, red lips and supple(柔韧的)knees; it is a matter of will, a quality of imagination, a vigor of the emotions; it is the freshness of the deep springs of life.Youth means a temperamental predominance(支配,主导)of courage over timidity(胆怯),of the appetite for adventure over the love of ease. This often exists in a man of 60 more than a boy of 20. Nobody grows old merely by a number of 相似文献
2.
When you watch an American film or TV play,you may notice thatwhile a policeman is cuffing(给……上手铐)a suspect(嫌疑犯),he issaying something or reading something from a piece of paper to him.What the policeman is saying or reading is called Miranda Rights. Under the Constitution(宪法) of the United States of America,a personaccused(被控告)of a crime has the right to the assistance(援助)of a 相似文献
3.
一、完形填空.(10分) Men first measured time ＿＿1) using a stick in the ground.The length of the ＿＿ 2) shadow would ＿＿3) what time of day if was.＿＿4),the Egyptians used a pillar,＿＿ 5) as a gnomon,and then developed a simple sundial, ＿＿ 6) consisted of a stone with a pointer on it .The stone was placed in an east-west direction,and the shadow of the pointer showed the time. 相似文献
4.
INTRODUCTION An important problem in foundation engineeringis the determination of the rate of settlement of a raftfoundation placed on a deep clay layer. Gibson andMcNamee (1957), and McNamee and Gibson (1960a;1960b) considered the problem of normal uniformloading applied to the surface of a half-space andshowed that one-dimensional theory gives a markedunderestimate of the rate of settlement. This theorycorresponds to the case of a perfectly flexible footing.However, it is often… 相似文献
5.
黄卫峰 《第二课堂(小学)》2008,(2):124-125
Not long ago, a series of new images for the major characters in the film Journey to the West(《西游记》) designed by Zhang Jizhong(张纪中)was made known to the public. According to Mr. Zhang, Sun Wukong (孙悟空) would appear in the form of a human being instead of a monkey; Tang Seng (唐僧) would look like a masculine man instead of a handsome young man; and Zhu Bajie(猪八戒)would be a wild boar (野猪) instead of a domestic pig. Such images, which are totally different from the traditional ones, have caused a great shock. 相似文献
6.
Thousands of years ago, none of the animals of the forest had a tail. Lion was the king of the forest. One day, the lion ordered (命令) all the animals to go to the old pagoda tree (槐树) to get a tail. During the day time, if somebodydidn' t arrive, it could not get a tail, and would be driven out of the forest. 相似文献
7.
杨正瓴 《天津大学学报(英文版)》2011,17(6):446-449
The more unambiguous statement of the P versus NP problem and the judgement of its hardness, are the key ways to find the full proof of the P versus NP problem. There are two sub-problems in the P versus NP problem. The first is the classifications of different mathematical problems (languages), and the second is the distinction between a non-deterministic Turing machine (NTM) and a deterministic Turing machine (DTM). The process of an NTM can be a power set of the corresponding DTM, which proves that the states of an NTM can be a power set of the corresponding DTM. If combining this viewpoint with Cantor’s theorem, it is shown that an NTM is not equipotent to a DTM. This means that "generating the power set P(A) of a set A" is a non-canonical example to support that P is not equal to NP. 相似文献
8.
The averaging analysis was carried out to study the motion of a quasi-axisymmetrical gyrostat under a small-magnitude self-excited control troque.The common approach to investigating the problem of rigid body rotatyion under the action of a small torque known in the body frame was described.Using this approach,the problem(Grammel‘s problem for the case of small torque) that is maintaining the angular velocity of a quasi-axisymmetrical gyrostat using a control torque quadratic in the angular velocity was solved.Maintaining the angular velocity of a quasi-axisymmetrical gryostat using a control torque quadratic in the angular velocity was solved. 相似文献
9.
The influence of solvent (in its gaseous state) on the stability of crystallized organic compounds was investigated. Through two examples of studies on the solid/vapour equilibria made in our lab, several behaviors were highlighted: (i) a new hydrated phase (thermodynamically stable) of an active pharmaceutical ingredient (API) was detected after the recrystallization starting from a deliquescent state, (ii) a spontaneous resolution of a hydrated racemic compound towards an anhydrous conglomerate can occur during the desolvation under the precise conditions of temperature and humidity. This study illustrates that knowledge about solid/vapour equilibrium is a crucial step during the complete characterization of solid organic compounds. 相似文献
10.
In order to get a sound casting of the alloy with a solidification range, the principle of directional solidification (DS) and the layer-by-layer solidification(LBLS) should be followed, especially in designing foundry process of steel casting. Using the principles, the reasons for the forming of the defects on the surface of the chain wheels teeth and groove and the forming of MT (magnetic particle testing) thin lines were analyzed. The results of the metallographic observation and the numerical simulation show that the low temperature 相似文献
11.
Barcelona 1992 Emblem 巴塞罗那的艺术光芒照亮五环 The official emblem,designed by Josep Maria Trias from Barcelona,depicted a dynamic human figure in a stance that suggested someone jumping an obstacle(which consisted of the five Olympic tings) and the simple, gestual lines reduced the characterisation of the figure to the head (in the blue of the Mediterranean),the grins (the yellow of the sun and wide open in sign of hospitality) and the legs(a vivid red). 相似文献
12.
《海外英语》2007,(Z1)
Complete the gaps with the correct forms of the verbs in brackets. At the turn of the century, China (1) (rule) by the Manchu Dowager Empress, Tzu Hsi, a ruthless woman who (2) (dispose) of many to consolidate her power. As mother of the Child Emperor her position (3) (be) unassailable, but a new threat (4) (loom). Increasing trade with the West had resulted in a flood of Europeans (5) (bring) their new ideas about equality for all … 相似文献
13.
The convergence criterion of Newton’s method to find the zeros of a map f from a Lie group to its corresponding Lie algebra is established under the assumption that f satisfies the classical Lipschitz condition, and that the radius of convergence ball is also obtained. Furthermore, the radii of the uniqueness balls of the zeros of f are estimated. Owren and Welfert (2000) stated that if the initial point is close sufficiently to a zero of f, then Newton’s method on Lie group converges to the zero; while this paper provides a Kantorovich’s criterion for the convergence of Newton’s method, not requiring the existence of a zero as a priori. 相似文献
14.
崔荣斌 《中学生英语读写(高中版)》2003,(1)
你想知道美国西部牛仔流行的原因吗？你想知道他们过去的主要工作和生活情况以及现在吗？请读读下篇文章。A cowboy wears a big hat and rides a strong horse under the wide, open skies of the American West. He can rope a cow and jump from the top of a building onto a waiting horse. He is a man of few words, a man of lonely independence(独立)and complete freedom. That is the motion picture image(画像) of an American cowboy, but not all the images are true. A real cowboy of the old west was simply a fa… 相似文献
15.
Pearls are formed naturally inside oysters(牡蛎) .But only one oyster in a thousand produces a pearl large enough to be a precious jewel.Oysters produce pearls to protect themselves. Sometimes a tiny piece of sand gets inside an oyster's shell (壳) .It could harm the soft flesh of the oyster.So the oyster covers the piece of sand with a layer (层) of smooth shell material .Each year new layers are added,and the pearl gets bigger. 相似文献
16.
李士芗 《现代远程教育研究》2000,(3)
综合练习 A1 完形填空(10分)Men first measured time (1) using a stick in the ground.The length of the (2) shadow would (3) what time of day itwas.(4),the Egyptians used a pillar,(5) as a gnomon,andthen developed a simple sundial,(6) consisted of a stone with apointer on it.The stone was placed in an east-west direction,and the shadow of the pointer showed the time.About 300 BC,a Babylonian (7) Berosus invented a semi-circular sundial,(8) he marked twelve hours.The Babyloni-am,like the Egyptians,divided daylight (9) twelve parts andnight into twelve.This meant that an hour would have differ-ent lengths (10) different times of the year.A daytime hourmight be longer or shorter than a nighttime one.These hoursare known as 'temporary hours'.(1)A.with B.byC.through D.in 相似文献
17.
Effect of the scale of quantitative trait data on the representativeness of a cotton germplasm sub-core collection 总被引：1，自引：0，他引：1
Jian-cheng WANG Jin HU Ya-jing GUAN Yan-fang ZHU 《Journal of Zhejiang University. Science. B》2013,14(2):162-170
A cotton germplasm collection with data for 20 quantitative traits was used to investigate the effect of the scale of quantitative trait data on the representativeness of plant sub-core collections.The relationship between the representativeness of a sub-core collection and two influencing factors,the number of traits and the sampling percentage,was studied.A mixed linear model approach was used to eliminate environmental errors and predict genotypic values of accessions.Sub-core collections were constructed using a least distance stepwise sampling(LDSS) method combining standardized Euclidean distance and an unweighted pair-group method with arithmetic means(UPGMA) cluster method.The mean difference percentage(MD),variance difference percentage(VD),coincidence rate of range(CR),and variable rate of coefficient of variation(VR) served as evaluation parameters.Monte Carlo simulation was conducted to study the relationship among the number of traits,the sampling percentage,and the four evaluation parameters.The results showed that the representativeness of a sub-core collection was affected greatly by the number of traits and the sampling percentage,and that these two influencing factors were closely connected.Increasing the number of traits improved the representativeness of a sub-core collection when the data of genotypic values were used.The change in the genetic diversity of sub-core collections with different sampling percentages showed a linear tendency when the number of traits was small,and a logarithmic tendency when the number of traits was large.However,the change in the genetic diversity of sub-core collections with different numbers of traits always showed a strong logarithmic tendency when the sampling percentage was changing.A CR threshold method based on Monte Carlo simulation is proposed to determine the rational number of traits for a relevant sampling percentage of a sub-core collection. 相似文献
18.
India(印度)the count叮of peaeoeks(孔雀之国)Bangladesh(孟加拉国)the country of jute(黄麻之国)se职咧(塞内加尔)the country of peanuts(花生之国)Nig叫尼日尔)the country in the desert(沙摸之国)Som亦a(索马里)thecoun仰of eamels(骆驼之国)M习耐(马拉维)the country of rivers and lakes(水乡之国)Bulg娜对a(保加利亚)the conntry of roses(玫瑰之国)Fiul面d(芬兰)theco,ntry of a thousand lakes(千湖之国)场而甸榔威)the eountry Of fishe叮(飞鱼之国)俪tZerland(瑞士)the eount叮of banking(金融之国)Mexieo(墨西哥)th。。o… 相似文献
19.
A simple method for calculating the 3D coordinates of points on a moro object in a multi-camera system is proposed.It simplifies the algorithms used in traditional computer vision system by eliminating the calculation of the CCD( charge coupled device) camera parameters and the relative position between cameras,and using solid geometry in the calculation procedres instead of the calculation of the complex matrixes,The algorithm was used in the research of generating a virtual magnified 3D image of a micro object to be operated in a micro operation system,and the satisfactory results were obtained.The application in a virtual tele-operation system for a dexterous mechanical gripper is under test. 相似文献
20.
William Wordsworth was the representative of the British "Lake poets" In his poems he aimed at simplicity and purity of the language,fighting against the conventional forms of the 18th century poetry.He transformed his observation of the landscape into the revelation of the beauty of nature in poetry,and thus expressed his nature philosophy.In this article the author briefly analyses the organization of his poem: "Ode: Intimation of Immortality" and mainly elaborates her understanding of the poet’s na-ture-philosophy in four points:(a) Man is sensitive to all natural influences in childhood.(b) Nature has a moral and spiritual sig-nificance and helps the poet understand the mystery of human life.(c) Life is but a stage.(d) All good poetry is the spontaneous overflow of powerful feelings;it takes its origin from emotion recollected in tranquility. 相似文献