音的主要性质-解放军文职人员招聘-军队文职考试-红师教育
发布时间：2017-08-14 10:30:46音的高低 音的强弱 音的长短 音色(1)音有高低、强弱、长短、音色四种主要性质，在音乐表现中非常重要，其中以音的高低和长短最为重要。不知道您是否有这样的体会：对于一首歌，不管您人声演唱还是乐器演奏，唱的声音是小是大，也不管您演唱或演奏时用什么调，音的强弱及音色有了变化，但这支歌的旋律依旧。可是，如果这首歌的音高或音的长短有改变的话，则音乐的感受就会受到严重的影响。可见，对一段旋律来说，音高和音长短的重要性。(2)音的高低决定于物体在一定时间的振动次数（频率）。振动次数越多，音越高；振动次数越少，音越低。音的强弱决定于振幅（音 的振动幅度）的大小。振幅越大，音越强；振幅越小，音越弱。音的长短决定于音的延续时间的不同。音的延续时间越长，音越长；音的延续时间越短，音越短。而音色由发音体的性质、形状及泛音的多少等多种因素决定。(3)什么是音色？ 音色指音的感觉特性。是音乐中极为吸引人、能直接触动感官的重要表现手段。发音体的振动是由多种谐音组成，其中有基音和泛音，泛音的多寡及泛音之间的相对强度决定了特定的音色。人们区分音色的能力是天生的，音色分为人声音色和器乐音色。人声音色高、中、低音，并有男女之分；器乐音色中主要分弦乐器和管乐器，各种打击乐器的音色也是各不相同的。
解放军文职招聘考试福娃的含义-解放军文职人员招聘-军队文职考试-红师教育
发布时间：2017-06-29 12:43:25Dear paul,It was great to hear from you and I m very glad to tell you something about Beijing Olympic Mascots .There are 5 Friendlies , or Fu Wa in Chinese , to serve as the Mascots for Beijing 2008 Olympic Games . Designed to express the nature of Chinese children, the 5 doll-like Frinedlies are symbols of four popular animals-the Fish , the Panda , the Tibetan Antelope , the Swallow and the Olympic Flame . Each of the Friendlies has a Chinese name-Beibei , Jingjjing , Huanhuan , Yingying and Nini. When we put them together , they say Beijing Huan Ying Ni, or Welcome to Beijing ! in English . These lovely dolls show us the Olympic spirit of universal friendship , and they each represent one of the following-the sea , forest , fire , earth and sky . As you can see , their colours have something to do with the 5 colours of the Olympic rings .I really hope you may come to Beijing in 2008 ! Certainly I ll be your company then ! Looking forward to your arrival !Yours ,Li Hua
解放军文职招聘考试人生的选择-解放军文职人员招聘-军队文职考试-红师教育
发布时间：2017-08-29 20:55:51Directions:Study the following picture carefully and write anessay in which you should1) describe the picture,2) interpret its meaning, and3) point out its implications in our life.This simple picture represents a situation that every person must face: when approaching ajunction, which direction should one choose?Most viewers can empathize with the sense of hesitation and uncertainty embodied insuch an image. Without exception, everyone has to make choices in life, whether they concernschool, career, or love. While some choices are simple, one cannot avoid the task of makingdifficult decisions.Choices are often directly related to one"s happiness. University students,for example, facea hard and crucial decision upon graduating. Many students have difficulty deciding whether tocontinue studying or begin developing a career. Every individual is different, and one must takethe factors of one"s personal life into consideration. In addition to an awareness of specificcircumstances, however, making the right choice also depends on correct appraisal of oneself.In order to choose correctly, therefore, one must be both realistic and self aware.Furthermore, once having made a decision, one should seriously accept and pursue the pathone has chosen, and strive towards the realization of one"s goal with spirit.
水分对作物生产的重要性-解放军文职人员招聘-军队文职考试-红师教育
发布时间：2017-08-12 23:58:07水分对作物生产的重要性水是生命起源的先决条件，没有水就没有生命。植物的一切正常生命活动都必须在细胞含有水分的状况下才能发生。作物生产对水分的依赖性往往超过了任何其他因素。农谚 有收无收在于水，收多收少在于肥 充分说明了水对作物生产的重要性。水是连接土壤作物一大气这一系统的介质，水在吸收、输导和蒸腾过程中把土壤、作物和大气联系在一起。水是通过不同形态、数量和持续时间3方面的变化对作物起作用的。水的不同形态是指水的三态：固态、液态和气态；数量是指降水量的多少和大气湿度的高低；持续时间是指降水、干旱、淹水等的持续日数。上述3个方面对作物的生长、发育和生理生化活动产生重要作用，进而影响作物产品的产量和质量。二、作物对水分的吸收根是作物吸收水分的主要器官。作物通过根系从土壤中吸收大量水分，但只有o．1％～o．2％用于制造有机物，连同组成作物体内的水分在内也不超过所吸收水分的l％，其余绝大部分的水通过蒸腾作用而散失掉。蒸腾作用是指水分以气态通过植物体的表面(主要是叶片)散失到体外的现象。除根系吸水外，植物体的其他部位也能吸收水分。
