极性分子英语
极性(polarity),是指一个共价键或一个共价分子中电荷分布的不均匀性。如果电荷分布得不均匀,则称该键或分子为极性;如果均匀,则称为非极性。
键的极性是由于成键原子的电负性不同而引起的。当成键原子的电负性相同或相近时,核间的电子云密集区域在两核的中间位置附近,两个原子核正电荷所形成的正电荷重心和成键电子对的负电荷重心几乎重合,这样的共价键称为非极性共价键。
分子极性
一个共价分子是极性的,是说这个分子内电荷分布不均匀,或者说,正负电荷中心没有重合。分子的极性取决于分子内各个键的极性以及它们的排列方式。在大多数情况下,极性分子中含有极性键,非极性分子中含有非极性键或者极性键。
然而,非极性分子也可以全部由极性键构成。只要分子高度对称,各个极性键的正、负电荷中心就都集中在了分子的几何中心上,这样便消去了分子的极性。这样的分子一般是直线形、三角形或四面体形。
以上内容参考:百度百科——极性
当然不是一回事啦 多去看看定义,课本应该熟悉才行
化学是自然科学的一种,在分子、原子层次上研究物质的组成、性质、结构与变化规律。那么接下来给大家分享一些关于基本的化学 英语单词 ,希望对大家有所帮助。
基本的化学英语单词
氨 ammonia
氨基酸 amino acid
铵盐 ammonium salt
饱和链烃 saturated aliphatic hydrocarbon
苯 benzene
变性 denaturation
不饱和烃 unsaturated hydrocarbon
超导材料 superconductive material
臭氧 ozone
醇 alcohol
次氯酸钾 potassium hypochlorite
醋酸钠 sodium acetate
蛋白质 protein
氮族元素 nitrogen group element
碘化钾 potassium iodide
碘化钠 sodium iodide
电化学腐蚀 electrochemical corrosion
电解质 electrolyte
电离平衡 ionization equilibrium
电子云 electron cloud
淀粉 starch
淀粉碘化钾试纸 starch potassium iodide paper 二氧化氮 nitrogen dioxide
二氧化硅 silicon dioxide
二氧化硫 sulphur dioxide
二氧化锰 manganese dioxide
芳香烃 arene
放热反应 exothermic reaction
非极性分子 non-polar molecule
非极性键 non-polar bond
化学常用英语词汇
肥皂 soap
分馏 fractional distillation
酚 phenol
复合材料 composite
干电池 dry cell
干馏 dry distillation
甘油 glycerol
高分子化合物 polymer
共价键 covalent bond
官能团 functional group
光化学烟雾 photochemical fog
过氧化氢 hydrogen peroxide
合成材料 synthetic material
合成纤维 synthetic fiber
合成橡胶 synthetic rubber
核电荷数 nuclear charge number
核素 nuclide
化学电源 chemical power source
化学反应速率 chemical reaction rate 化学键 chemical bond
化学平衡 chemical equilibrium
还原剂 reducing agent
磺化反应 sulfonation reaction
关于化学的英语单词
霍尔槽Hull Cell
极性分子 polar molecule
极性键 polar bond
加成反应 addition reaction
加聚反应 addition polymerization
甲烷 methane
碱金属 alkali metal
碱石灰 soda lime
结构式 structural formula
聚合反应 po1ymerization
可逆反应 reversible reaction
空气污染指数 air pollution index
勒夏特列原理 Le Chatelier's principle 离子反应 ionic reaction
离子方程式 ionic equation
离子键 ionic bond
锂电池 lithium cell
两性氢氧化物 amphoteric hydroxide 两性氧化物 amphoteric oxide
裂化 cracking
裂解 pyrolysis
硫氰化钾 potassium thiocyanate
硫酸钠 sodium sulphide
氯化铵 ammonium chloride
氯化钡 barium chloride
氯化钾 potassium chloride
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极端分子的英文
极端民族主义者ultranationalist
导语:黑发不知勤学早,白发方悔读书迟。下面是我为大家整理的,英语知识。想要知更多的资讯,请多多留意CNFLA学习网! 1高中英语单词escape的词性及含义 英[ɪˈskeɪp] 美[ɪˈskep] v.逃脱;逃离;躲过;泄露 n.逃走;逃跑工具或方法;野生种;泄漏 adj.使逃避困难的;使规避问题的 第三人称单数:escapes复数:escapes现在分词:escaping过去式:escaped过去分词:escaped 2高中英语单词escape用法详解 1.表示“逃走”或“逃脱”,已含有“脱离”的意思,因此通常不与away,off等副词连用。如: 小偷逃走了。 误:The thief has escaped away. 正:The thief has escaped. 2.下列情况,通常是不及物动词,其后可接介词 from: (1)表示从具体的某一场所逃走。如: They escaped from the burning house (prison)。他们从着火的房子里(监狱里)逃了出来。 (2)表示液体或气体等漏出或泄漏。如: Some gas is escaping from the pipe.煤气管在漏气。 (3)表示从监禁或管制等状态中逃脱或逃走。如: A lion has escaped from its cage. 有一只狮子从笼子里逃走了。 The boy longed to escape from his mother‘s domination.这男孩渴望摆脱母亲的操纵。 3.下列用法,通常是及物动词,其后无需接介词 from 或其它介词: (1)表示被遗忘或未被注意等。如: Nothing escaped his attention. 任何东西逃不过他的注意。 I‘ve met her before, but her name escapes me. 我以前见过她,但她的名字我忘记了。 (2)表示逃避或躲避不愉快的事(如危险,处罚,不幸,灾难等)。如: He tried to escape punishment. 他设法躲避惩罚。 Where can we go to escape the crowds? 我们到哪里才能避开这些人群? 若后接动词,要用动名词,而不能用不定式。如: He narrowly escaped being drowned. 他险些被溺死。 There is no way to escape doing the work. 没有办法逃脱做这项工作。 「注」逃避或躲避监禁或管制等不愉快的事,是及物动词,其后无需用介词;但若是指从监禁或管制等状态中逃脱或逃走,则为不及物动词,其后可接介词(如 from 等)。比较: He escaped prison.他躲避了监禁(即本该入狱但逃避了)。 He escaped from prison.他越狱了(即已经入狱但逃走了)。 3高中英语escape的双语例句 1.A prisoner has escaped from a jail in northern England 一名囚犯从英格兰北部的`一所监狱中越狱。 2.The man made his escape. 那个人逃跑了。 3.The two officers were extremely lucky to escape serious injury 那两名警官极其幸运,没有受重伤。 4.But for me television is an escape. 但是对我而言,看电视是一种逃避的方法。 5.We all need the occasional escape route from the boring, routine aspects of ourlives 我们都时不时需要逃避生活中的无聊和平淡。 6.It was an actor whose name escapes me for the moment 那个男演员的名字我一时想不起来了。 7.Leave a vent open to let some moist air escape. 打开一个通风口,让潮气逸出一些。 8.They are reported to have escaped to the other side of the border 有报道称他们已经逃过了国境线。 9.He was fatally wounded as he tried to escape. 他在设法逃跑的时候受了致命伤。 10.The man's girlfriend managed to escape unhurt 那个男人的女朋友成功逃脱,毫发无损。 11.He narrowly escaped with his life when suspected right-wing extremists fired shotsinto his office. 疑似右翼极端分子的一些人向他的办公室开枪扫射,他侥幸逃生。 12.This has, in fact, turned out to be a wonderful escape clause for dishonestemployers everywhere. 事实上,这已经成为所有狡猾的雇主们用来躲避责任的绝妙条款。 13.Blonde and slender, she was too striking to escape their attention. 金发细腰的她太引人注目了,他们很难不注意到她。 14.The prisoners attempted to escape but failed. 囚犯们企图逃跑,但是失败了。 15.All escape routes were blocked by armed police 所有逃跑的路都被武警封锁了。 16.He told us the story of his escape from the enemy. 他向我们叙说了他逃离敌人的经过。 17.They decided the time was right for their escape. 他们认为逃跑的时机到了。 18.The first bubbles to escape from the liquid are a mixture of air and hydrogen.从该液体中最先逸出的气泡是空气和氢的混合物。 19.Their grandfather had left his village in order to escape the grinding poverty.为了摆脱贫困的煎熬,他们的祖父离开了村子。 20.The car was badly smashed, but he was lucky to escape with life and limb. 汽车被撞得一塌糊涂,可他却很幸运地安全脱险了。 21.A small boy tumbled off a third floor fire escape 一个小男孩从3楼防火梯上摔了下来。 22.The prisoners used the tunnel to escape from jail. 囚犯们利用这条地道越狱逃跑了。 23.The enemy cannot escape from our control. 敌人逃不出我们的手心。 24.They managed to escape after being arrested by the resistance. 他们被抵抗组织抓住后又设法逃脱了。 25.Little by little, he formulated his plan for escape. 他一点一点地设计构思出了逃跑的方案。 26.The residents were trying to escape from the fire but were overcome by smoke.居民试图逃离火场,却被浓烟熏倒了。 27.The news of Tandy's escape had shaken them all 坦迪逃跑的消息让他们所有人都无比震惊。 28.Primitive humans needed to be able to react like this to escape from dangerousanimals 原始人必须要能作出这样的反应以逃避危险的动物。 29.He could stand no more and engineered an escape 他无法再忍受,便策划了出逃。 30.The driver managed to escape from the vehicle and shout a warning. 那名司机设法从车里逃了出来并大声警告别人。
EXTREMIST(S)HUNDRED-PERCENTER(S)
可能有两个说法:nationalist extremists 民族主义极端分子extreme nationalists 极端民族主义者
积极性英语
cultivating initiative
give full play to one's initiative
是调动别人还是被人调动??主动-inspire sb entirely/completely 被动-be completely motivated或get inspired entirely
这样的话我们就可以激发学生对英语的积极性= 以这些做法就可以激发学生对学习英语的热情= We can motivate the students to explore their passion for learning English by these actions.
入党积极分子英文
Activist to join the party
Lesson learned the backbone: management, microeconomics, macroeconomics, management information system, accounting, marketing, human resources management, logistics management theory and practice, operations research, international trade theory and practice, and logistics system design, distribution center planning and location, logistics overviewLove good especially long: basketball and badminton, table tennis, running, climbing, listening to music. Mastering Office softwareThe awards, which school learning and social practice: school obtain excellent students, joining of molecular honor; As a youth corps cell organization member;For our business association, and become the members of the community organization;Actively participate in school sports meeting, the running AnBoCao contest;The 2007 done beautiful microwave oven promoters2009.6 in shaanxi huanglingcounty transportation company internship2009.7-2009.9 in shenzhen new jie FeiBao freight services limited liability company customer service department internThe certification by book: intermediate logistics divisionThis certificate by the China federation of logistics &purchasing and national logistics standardization technical committee awarded.National computer rank secondary certificates driver's licenseTo ask job means traffic/storage/logistics: business/procurement, import and export/trade /Since I review price: I work in life, all things are full of positive confidence, easy to get along with people, pay attention to team cooperation spirit. Like to know the real-time news every day, good at investment and financial management.
Joins a political party the activist
Main lesson learned: management science, microeconomics, macroeconomics, management information systems, accounting, marketing, human resources management, logistics management theory and practice, operations research, theory and practice of international trade, logistics system design, planning and site distribution center, logistics Introduction Hobbies: Basketball, badminton, table tennis, running, climbing, listening to music. Office Office software proficiency Awards received in school, learning and social practice: the best students in school to obtain line, party activists honor; serving as a branch of the organization members; Business associations to participate in our community and become a member of the Organization Department; Actively participate in school sports in the running, Guangbo Cao competitions; Promoters of microwave ovens in 2007 did the United States 2009.6 Transportation Huangling County in Shaanxi internship 2009.7-2009.9 new kit in Shenzhen Flying Leopard Freight Services, LLC customer service training The certificates were: Intermediate Logistician The certificates by the China Federation of Logistics and Purchasing and the National Logistics Standardization Technical Committee issued. National Computer Driving Licence Certificate II Employment intentions: transport / warehousing / logistics, business / procurement / trade / export Self-evaluation: I am life, work and everything is full of confidence and positive, easy to get along with others, focus on teamwork. Like to know the daily real-time news, good investment and wealth management.
极化性英文
偏振这个词更偏向于矢量描述,极化则更偏向于强度描述,但本质上都是描述电磁波在某一方向上集聚的现象。偏振主要用于光学的描述,极化主要用于雷达等低频电磁波的描述。英文都是polar相关词汇。
英文名称:Polarization Effect,极化效应是指讲迅速增长的推动性产业吸引和拉动其它经济活动的效应。