新目标英语七年级(上)重点、考点归纳总结

<正>一、重点词汇过关1.color(1)n.颜色;肤色;颜料;脸色◇例如:Nancy liked the skirt well enough, but complained about the color.(南希还挺喜欢这件裙子,只是有点不满意它的颜色。)The color is coming back to your face.(你的气色在好转。)(2) vt.粉饰;给……涂颜色◇例如:     

中考考点归纳与链接——重点词汇(二)

<正>1.shine(1)shine作名词n.光泽;光亮;光彩◇例如:If the plate loses its shine,you can rub it up a little and it’ll look like new.(如果盘子失去光泽,你可以稍为擦试一下,它看起来就像新的。)(2)shine作动词(1)vi.发光;发亮;反射光;照耀◇例如:The sun is shining brightly in the sky.(太阳在天空明亮地照耀着。)His eyes shone brightly when he finally     

中考考点归纳与链接——重点语法

<正>★代词it, one, that的用法区别1.它们均作代词指代前文提到的名词。但it所指的是同名同物,one和that所指是同名异物。◇例如:I like the bike, but I have no enough money to buy it.(我喜欢这辆自行车,但我没有足够的钱买它。)     

Laboratory creep tests for time-dependent properties of a marble in Jinping Ⅱ hydropower station

In order to investigate the time-dependent behaviors of deep hard rocks in the diversion tunnel of Jinping II hydropower station,uniaxial creep tests were carried out by using the triaxial testing machine RC-2000.The axial compressive load was applied step by step and each creep stage was kept for over several days.Test results show that:(1) The lateral deformation of rock specimens is 2-3 times the axial compressive deformation and accelerates drastically before damage,which may be employed as an indicator to predict the excavation-induced instability of rocks.(2) The resultant deformation changes from compression to expansion when the Poisson’s ratio is larger than 0.5,indicating the starting point of damage.(3) In the step-loading stages,the Poisson’s ratio approximately remains constant;under constantly imposed load,the Poisson’s ratio changes with elapsed time,growing continuously before the specimen is damaged.(4) When the applied load reaches a certain threshold value,the rock deteriorates with time,and the strength of rocks approximately has a negative exponent relation with time.(5) The failure modes of the deep marble are different in long-and short-term loading conditions.Under the condition of short-term loading,the specimen presents a mode of tensile failure;while under the condition of long-term loading,the specimen presents a mode of shear failure,followed by tensile failure.     

名词的“两面派”

<正>英语中,有些名词具有"两面派"的特点,它们既可以用作可数名词,又可以用作不可数名词,其表达的含义也有所不同。一、hair hair用作可数名词时指"一根根的头发",其复数形式为hairs;用作不可数名词时指"毛发",也可通指头发。例如:My mother has some white hairs in her head.(我母亲头上有几根白发。)The cat has a fine coat of hair.(这只猫长着一身好毛。)Kate’s hair is long.(凯特的头发长。)What color is your hair?(你的头发是什么颜色     

屋頂圓柱殼體之近似計算

一、緒論在工廠及民用建築中常採用屋頂圓柱殼體。早在1925年,德國德克荷夫-衛德曼(Dyckerhoff & Widmann)公司與蔡司(Carl Zeiβ)公司合作試製一長6米,斷面為半椭圓形(椭圓長軸為4米)之殼體。當時因為是根據薄膜理論計算,所以採 This paper presents an approximate method for the calculation of elastic displacements and stresses of cylindrical roof shells. The calculations are based upon the following assumptions:(1) The thickness of the shell is sufficiently small, as compared with other dimensions.(2) The radius, longitudinal length and transverse arc-length of the shell are all magnitudes of the same order. (3) The normals of the unstrained middle surface deform into the normals of the strained middle surface (Kirchhoff-Love's assumption).(4) The contribution to the deformation, due to the normal stress in the direction of the shell, is negligible.(5) The material obeys Hooke's law.Among these, (1), (3), (4), and (5) are assumptions adopted by almost all existing theories. The assumption (2) is fulfilled for the common     

Inconsistency of changes in uniaxial compressive strength and P-wave velocity of sandstone after temperature treatments

It is generally accepted that the uniaxial compressive strength(UCS)and P-wave velocity of rocks tend to decrease simultaneously with increasing temperature.However,based on a great number of statistical data and systematic analysis of the microstructure variation of rocks with temperature rising and corresponding propagation mechanism of elastic wave,the results show that(1)There are three different trends for the changes of UCS and P-wave velocity of sandstone when heated from room temperature(20
C or 25
C)to 800
C:(i)Both the UCS and P-wave velocity decrease simultaneously;(ii)The UCS increases initially and then decreases,while the P-wave velocity decreases continuously;and(iii)The UCS increases initially and then fluctuates,while the P-wave velocity continuously decreases.(2)The UCS changes at room temperaturee400
C,400
Ce600
C,and 600
Ce800
C are mainly attributed to the discrepancy of microstructure characteristics and quartz content,the transformation plasticity of clay minerals,and the balance between the thermal cementation and thermal damage,respectively.(3)The inconsistency in the trends of UCS and P-wave velocity changes is caused by the change of quartz content,phase transition of water and certain minerals.     

“绿色”的故事

<正>There are many expressions about the color"green".So today,let's start with the color"green".语言中有很多表达与"绿色"有关。今天我们就从"绿色"说起吧。Green is an important color in nature.It is the color of grass and the leaves on trees.It is also the color of most growing plants.绿色是自然界中一种重要的颜色。它是青草和树叶的颜色,也是大多数生长中的植物的颜色。Sometimes,the word green means young,fresh and growing.Sometimes,it describes something that is not yet     

利用改进的DDA进行边坡上落石运动的数值模拟

The reasonable design of protective structures to mitigate the hazards from rock fall depends on the knowledge of motion behaviors of falling stones,such as the falling paths,velocities,jump heights and distances.Numerical simulation is an effective way to gain such kind of knowledge,In this paper,the discontinuous deformation analysis (DDA) is applied to rock fall analysis.In order to obtain more reliable results,the following improvements and extensions are made on the original DDA.(1)Solve the problem of block expansions due to rigid body rotation error.(2) Add the function of modeling the drag resistance from air and plants so that the velocities of falling stones obtained by simulations are good enough in agreement with those by experiments in situ.(3)Add the capability to consider energy loss due to block collisions so that the jumping heights and distances obtained by simulations are good enough in agreement with thos by experiments even for the slope with very soft layer on its surface.One of application examples is presented to show that the extended DDA is very effective and useful in rock fall analysis.Therefore,the presented method is expected to be put into wide use in slop stability analysis.     

中考考点归纳与链接——重点短语(二)

<正>1. feel like(1)"摸起来像……"◇例如:It feels like silk.(这东西摸起来像丝绸。)This feels like an orange.(这东西摸起来像个桔子。)(2)"感觉像(是)……;有……的感觉;给人的感觉(像)是……"◇例如:My legs feel like cotton wool.(我感觉两条腿像棉花一样。)I’m surprised that he feels like that.(我