小学科学教科版五年级下册练习题及答案.doc

relationship between Government and business. The two sessions, General Secretary of Pro, clear the word succinctly summarized the new relationship between Government and business, as pure politics, reshaping the political relationship specified in the direction. District leaders in handling political and business relations, engage in trading power for money, and finally stumbled, we a lesson, always keep in mind that Pro, clean practicing Pro, clear. Pro is to open a sincere engagement with private enterprise to help solve practical difficulties; Clear is to clarify the Division of power, exercised in accordance with, private entrepreneurs with innocent purity, not abusing power for personal gain, not to engage in trading power for money. Third, in order to maintain fairness and justice. Fairness and justice is the lifeline of the rule of law, is the best development environment. Currently, lax law enforcement and the judicial sector in our region also exist to varying degrees, law enforcement departments and individual window units power for personal gains and bribes, thick friends, relations, human cases, money cases in which seriously infringe on the legitimate rights and interests of enterprises and people. Especially some law enforcement and inspection for profit purposes, deliberately looking for corporate loopholes, found directly under the ticket does not give business improvement opportunities. We recruit a company doesnt easily, cultivating a business more difficult, never for personal gain, systematic harassment, card, last checked to check to get the enterprise collapsed. To guarantee the legitimate rights and interests. Always proceed from the overall situation of reform and development of services, fully consider the characteristics of production and management in non-public enterprises and social benefits, an accurate grasp of legal limits, protect the enthusiasm of entrepreneurs and practitioners in innovation and entrepreneurship, enhancing expectations and confidence. To promote strict enforcement. Strengthening law enforcement procedures, improve law enforcement performance evaluation, strengthening the supervision of law enforcement, exploration and practice of risk control mechanism of law enforcement to further standardize the social security, urban management, road traffic administrative law enforcement, effectively free, extensive law-enforcement and lax enforcement of law enforcement and other issues. To uphold justice. Justice is the last line of Defense to safeguard fairness and justice, to unequivocally support the courts and procuratorates independently exercise level . Judicial activities were rampant, must not be allowed to run, favors, money, must not be allowed to knowingly violate the miscarriage, violations of the legitimate rights and interests of the masses must not be allowed to abuse of power, to make forest mass can be felt in every judicial cases in equity and justice. Four to deepen grass-roots governance according to lawchain do long, and put scale big. To serve the development of enterprises. Duocuo simultaneously improving service efficiency, build better public services platform, enhance work efficiency, initiative to help businesses solve the project procedures, financing loans, issues such as land-use approval, reduce operating costs, business travel light and enhance the confidence to overcome all kinds of difficulties and the Foundation, real entrepreneurial passion play entrepreneurship, enhance the internal vitality and creativity. SI XING an construction, promoting the rule of law, tries to make the transformation of forest development XI General Secretary stressed, to reinvigorate Northeast China, optimized development environment is very important. Environment of rule of law most gather Moss, the most conducive to development. Improving the leading cadres using the method of thought and the rule of law Administration work, problem-solving, the ability to promote the development, is the key to promoting the rule of law. The law may affect the efficiency of out of the path of development will be more smooth, won development gains will be sustained, and end with greater efficiency. Leading cadres at all levels should take the lead in respect of law law, abide by, and actively foster Socialist culture, actively promoting the field of multi-level governance according to law, guide the masses and consciously abide by the law, failing to find law, solve the problem by law, in accordance with the law prevail. XXX administration by law of leading cadres do not exist on the rule of law, law enforcement, casual, and vow not to investors, the new scores and other turmoil. These important expositions on my district create good development environment with highly targeted and guidance, especially the General Secretary pointed out that the chaos in my area also exists to varying degrees, some even quite serious. Leading cadres at all levels must improve the development environment of rule of law as a fundamental task, adhere to the problem oriented, solid and solve the problems in the construction of rule of law, to rule the new effect for development environment improvements. To hold key minority. Leaders of this group, although few in number, but the effect is critical. If a local leaders take the lead right according to law, in accordance with the law, the local CPPCC fresh, pragmatic and efficient development environment. Conversely, if a local leaders of ignoring the law, impunity, not only the political environment will be destroyed, will have serious implications for the development environment. Now, some leading cadres lack of awareness on the importance of learning, that learn or not does not matter. Think efficiency is too low too much, act according to the procedure, than an executive order getting along with. In dealing with complex issues, often speak of settling and done; on the issue of handling letters and visits, like to spend money and buy stop and stable, but disregard the law administration, in accordance with the law, the rulechain do long, and put scale big. To serve the development of enterprises. Duocuo simultaneously improving service efficiency, build better public services platform, enhance work efficiency, initiative to help businesses solve the project procedures, financing loans, issues such as land-use approval, reduce operating costs, business travel light and enhance the confidence to overcome all kinds of difficulties and the Foundation, real entrepreneurial passion play entrepreneurship, enhance the internal vitality and creativity. SI XING an construction, promoting the rule of law, tries to make the transformation of forest development XI General Secretary stressed, to reinvigorate Northeast China, optimized development environment is very important. Environment of rule of law most gather Moss, the most conducive to development. Improving the leading cadres using the method of thought and the rule of law Administration work, problem-solving, the ability to promote the development, is the key to promoting the rule of law. The law may affect the efficiency of out of the path of development will be more smooth, won development gains will be sustained, and end with greater efficiency. Leading cadres at all levels should take the lead in respect of law law, abide by, and actively foster Socialist culture, actively promoting the field of multi-level governance according to law, guide the masses and consciously abide by the law, failing to find law, solve the problem by law, in accordance with the law prevail. XXX administration by law of leading cadres do not exist on the rule of law, law enforcement, casual, and vow not to investors, the new scores and other turmoil. These important expositions on my district create good development environment with highly targeted and guidance, especially the General Secretary pointed out that the chaos in my area also exists to varying degrees, some even quite serious. Leading cadres at all levels must improve the development environment of rule of law as a fundamental task, adhere to the problem oriented, solid and solve the problems in the construction of rule of law, to rule the new effect for development environment improvements. To hold key minority. Leaders of this group, although few in number, but the effect is critical. If a local leaders take the lead right according to law, in accordance with the law, the local CPPCC fresh, pragmatic and efficient development environment. Conversely, if a local leaders of ignoring the law, impunity, not only the political environment will be destroyed, will have serious implications for the development environment. Now, some leading cadres lack of awareness on the importance of learning, that learn or not does not matter. Think efficiency is too low too much, act according to the procedure, than an executive order getting along with. In dealing with complex issues, often speak of settling and done; on the issue of handling letters and visits, like to spend money and buy stop and stable, but disregard the law administration, in accordance with the law, the rule2015年小学科学五年级下册第一单元测试题一、单项选择题。 1、不同材料构成的物体，如果体积相同，（B ）的物体容易沉；如果重量相同，体积（ D ）的物体容易沉。 A、轻 B、重 C、大 D、小2、当物体在水中受到的浮力大于物体受到的重力时就上浮，小于重力时就下浮。浮在水面的物体，（ A ）等于（C ）。A、浮力 B、压力 C、重力 D、动力3、潜艇有一个很大的压载舱。打开进水管道，往压载舱里装满海水，潜艇会（ B ），打开进气管道，用压缩空气把压载舱里的海水挤出舱外，潜艇就开始（ D ）。A、下沉 B、下潜 C、上浮 D、上升4、软木塞浮在（B ）上，塑料块浮在（C ）上，葡萄在（D ）上，铜砝码漂浮在（ A ）上。A、水银 B、油 C、水 D、糖浆5、（B ）发现了自然科学中的一个重要原理（B ）定律，即：物体在水中受到的浮力等于物体排开水的重力。A、伽利略 B、阿基米德 C、牛顿 D、爱迪生二、多项选择题。 物体在水中的沉浮与（AD）有关。 A、构成他们的材料 B、材料 C、液体 D、液体的性质三、填空题。 1、我们把物体在水中排开水的体积叫做（排开的水量）。 2、把小船和泡沫塑料块往水中压，手能感受到水对小船和泡沫塑料块有一个向下的力，这个力我们称它为水的（ 浮力 ）四、判断题。 1、同种材料构成的物体，改变它的重量和体积，沉浮状况会改变。（ ） 2、物体在水中都受到浮力的作用，物体浸入水中的体积越大，受到的浮力也越大。（ ） 3、潜艇既能在水中航行，又能在水下航行。（ ） 4、像泡沫塑料块这样浮在水面上的物体，都会受到水的压力。（ ） 5、当泡沫塑料块静止浮在水面时，它受到的浮力等于它受到的重力，且方向相同。（） 6、在约旦与巴勒斯坦之间，有一个名叫死海的咸水湖。死海里的水咸极了，含盐量比普通的海水高出六七倍。（ ）五、连线题。1、物体的沉浮。比同体积的液体重的物体 在液体中上浮比同体积的液体轻的物体 在液体中下沉 2、马铃薯在液体中的沉浮。在清水中 浮在浓盐水中 在浓糖水中 沉在浓碱水中 六、看图填空题。 1、感受浮力。（标出浮力和重力的位置） 2、测量泡沫塑料块受到的浮力。（标出浮力、重力和拉力的位置） 3、把泡沫塑料压入水中，一松手，为什么它会上浮？通过实验，我们知道了泡沫塑料块在水中受到的浮力与它浸入水中的（ 体积 ）有关，浸入水中的（体积 ）（排开的水量）越大，受到的浮力就越大。完全浸入水中受到的浮力远远大于它本身的重量，因此一松手，泡沫塑料就浮起来了。等到浮在水面上之后，泡沫塑料块为什么不再向上冒？因为此时它浸入水中的（体积）很小了，受到的浮力也很小。小到与它所受的重力相等，因此就不再上浮，也不下沉。小学科学五年级下册第二单元测试题一、单项选择题。1、水受热以后，（C ）会增大，而（D）不变。A、轻重 B、大小 C、体积 D、重量2、物体的热胀冷缩和微粒运动有关：当物体吸热升温以后，微粒加快了运动，微粒之间的距离（A），物体就（ C ）了；当物体受冷后，微粒的运动减慢，微粒之间的距离（ B ），物体就（D ）了。A、增大 B、缩小 C、膨胀 D、收缩3、（D ）的这种奇特性质曾被用在印刷上，早些年印刷书报用的铅字就掺有(D )。所说的铅其实是铅和（D ）的合金，当溶化了的合金浇进铜模里冷却凝固时，由于（D ）热缩冷胀，字的笔画会十分清晰，而且经久耐用。A、铜 B 、铋 C、钢 D、锑4、热总是从较（B ）的一端传向较（D ）的一端。A、粗 B、热 C、细 D、冷5、热传递主要通过热传导、对流和热辐射三种方式来实现。（ B ）：通过中介物（如水或空气）的流动而传热的过程。（C ）：物体以电磁波的形式向外发散热能的过程。 A）:过直接接触将热从一个物体传给另一个物体，或者从物体的一部分传递到另一部分的过程。A、热传导 B、对流 C、热辐射二、多项选择题。1、大多的（ABC ）都具有受热时体积膨胀，遇冷时体积缩小的性质。A、液体 B、固体 C、气体 D、物体2、有(ABCDEF)可以使我们的身体能热起来A、运动 B、吃食物 C、取暖器取暖 D、晒太阳 E、烤火 F、加穿衣3、大多数的金属会热胀冷缩，可是有两种金属就与众不同，它们是热缩冷张。这两种金属就是（BD ）。A、铜 B、锑 C、钢 D、铋4、（AD ）是热的良导体，吸热快，散热快；（BC ）是热的不良导体，吸热慢，散热慢。 A、钢 B、木头 C、塑料 D、铁三、填空题。 1、（热 ）是一种能量的形式，（热 ）能够从物体温度较高的一端向温度较低的一端传递，从温度高的物体向温度低的物体传递，直到两者温度相同。 2、物体由冷变热或由热变冷的过程中会发生（体积 ）的变化，这可以通过我们的感官感觉到或通过一定的装置和实验被观察到。3、水受热时体积膨胀，受冷时体积缩小，我们把水的体积的这种变化叫做（热胀冷缩 ）。 4、常见的物体都是由（微粒 ）组成的，而（微粒 ）总是在那里不断地运动着。 5、通过直接接触，将热从一个物体传递给另一个物体，或者从物体的一部分传递到另一部分的传热方法叫做（ 热传导 ）。四、判断题。1、热可以通过多种形式进行传递，不同的物质传递热的本领是相同的。（）2、加穿衣服会使人体感觉到热，因为衣服给人体增加了热量（）3、啤酒瓶或饮料瓶里面的啤酒、饮料都不会装满，这是商家侵犯消费者权益的行为。（ ）4、如果瓶内的空气体积膨胀，瓶内的空气就会往瓶外挤。只要想办法观察到瓶内的空气在往外跑，我们就知道瓶里的空气在膨胀了。（ ）5、钢铁造的桥在温度变化时会热胀冷缩。因此，铁桥通常都架在滚轴上。（ ）6、水有热胀冷缩的性质，空气有热胀冷缩的性质，铜和钢有热胀冷缩的性质所有物体都有热胀冷缩的性质。（ ）7、不同材料制成的物体，导热性能是一样的。（ ）8、空气是热的良导体。（ ）9、热量绝不会真正消失。它只是从一个物体转移到了另外一个、两个或更多的物体。（）五、看图填空题。1、你仔细观察过路面吗？工人叔叔在铺路的时候总是把水泥路做成一块块的，块与块之间都留有1厘米左右宽的缝隙。这是为什么呢？一条大马路做成平坦的一整条不是更好吗？原来，水泥路面在夏天被太阳晒得滚烫，受热体积（胀大 ），就会向四面延伸，有了这些缝隙。留出了延伸的余地。冬天冰天雪地，温度很低，水泥路面又要（收缩 ）。每一块水泥路面都（收缩），缝隙处被拉大。如果没有预先留下整齐的缝隙，那么水泥路面将会被自己的（热胀冷缩）拉得四分五裂，整个路面就要坏掉。所以水泥路面要做成一块块的。小学科学五年级下册第三单元测试题单元概述：本单元要让学生使用一些测量时间的重要设备做实验，从太阳钟、水钟到机械擒纵器在“创造”（制作）计时工具的实践过程中，了解人类计时仪器的发展史，认识技术对人类社会发展的作用。一、 单项选择题。1、计时工具（B ）的提高要靠技术、材料等的改进。A、美观性 B、准确性 C、实用性 D、时尚型2、钟面上的（C ）每转动一格，表示时间流逝了一秒钟，（C ）转动一圈则表示时间流逝了一分钟A、时针 B、分针 C、秒针 3在远古时代，人类用天上的太阳来计时。日出而作，日落而息。昼夜交替自然而然成了人类最早使用的计时单位（D ）A、时 B、分 C、秒 D、天4、在古代，人们还曾经利用流水来计时，（C ）根据容器内的水面随水的流出而下降，从而测出过去了多少时间；（D ）根据水滴以固定的速度滴入圆筒，使得浮标会随水量的增加而逐渐上升，从而显示流逝的时间。A、“流水型”水钟 B、“滴水型”水钟C、“泄水型”水钟 D、“受水型”水钟5、同一个单摆每摆动一次所需的时间是（C ）。A、不一定的 B、一定的 C、相同的 D、不相同的6、根据单摆的（D ），人们制成了摆钟，使时间的计量误差更小。A、准确性 B、易加工性 C、耐腐蚀性 D、等时性7、同一个摆，摆绳越（C ）摆动越（B ），摆绳越（D ）摆动越（A）。A、快 B、慢 C、长 D、短8、1583年，（D ）发现摆动一次的时间，只由摆绳的长短来决定，不但跟摆动幅度的大小没关系，而且跟石头的轻重也没关系；只要摆绳的长度一定，摆动一次的时间就一定。这就是单摆的等时性。A 、牛顿 B、爱因斯坦 C、爱迪生 D、伽利略二、 多项选择题。 1、钟表以（ACD ）计量时间。 A、时 B、天 C、分 D、秒2、（BD ）是根据日影长度制成的计时器。A、太阳能热水器 B、日晷 C、电子表 D、圭表三、填空题。 1、（时间）有时是指某一时刻，有时则表示一个时间间隔（即时长）。 2、摆的摆动快慢与摆绳的（长度 ）有关。 3、（日晷 ）又称“日规”，是我国古代利用日影测量时间的一种计时仪器。 4、（水钟 ）在我国古代又叫“刻漏”，是根据滴水的等时性原理来计时的工具。 四、判断题。 1、在不同的情况下，我们对相同时间（时长）的主观感受会不一样，但时间是以不变的速度在延伸的。（） 2、时间可以通过对太阳运动周期的观察和投射形成的影子来测量，一些有规律运动的装置也曾被用来计量时间。（） 3、长期以来，人们一直在寻找精确的计时方法，随着科学和技术的发展，人们制作的计时工具越来越精确。（） 4、阳光下物体影子的方向、长短会很快地发生变化。（） 5、通过一定的装置，流水能够用来计时，因为滴漏能够保持在一定的时间内以稳定的速度往下流。（）五、看图填空题。1、摆锤与齿轮操纵器是如何运作的？摆钟齿轮操纵器两端各有（倒钩 ），可以卡在齿轮中间，以便控制齿轮的转动。而齿轮操纵器又与（摆锤 ）相连。当摆锤来回摆动时，总会松开其中一端的操纵器，让它可以跳过一个齿，操纵器就可以控制一个齿，如此一个接一个有规律地使齿轮转动，同时带动指针转动。 摆锤在（最右边 ）时，长针部分的操纵器倒钩会卡住齿轮。摆锤摆到（最左边 ）时，长针部分的操纵器倒钩会松开，垂体的拉力会让齿轮往前滑动一齿，短针部分的操纵器倒钩随即卡住，不让它继续转动。当摆锤又摆回（最右边）时，齿轮又前进一齿，同时操纵器长针部分的倒钩又卡住齿轮。小学科学五年级下册第四单元测试题单元概述：本单元要让学生重演人类对地球运动的探索过程。基于可观察到的现象和事实，运用相对运动、参照物、模拟再现等原理和方法进行推理、论证，最终认识地球是如何运动的。一、 单项选择题。1、（D ）是历史上证明地球自转的关键性证据。A、伽利略摆 B、惠更斯摆 C、布鲁诺摆 D、傅科摆2、地球自转的方向是（B）（自西向东），周期为（C）小时。A、顺时针 B、逆时针 C、24 D、123、（C ）是历史上证明地球公转的关键性证据。A、流星周年视差 B、行星周年视差 C、恒星周年视差 D、卫星周年视差4、（B）是古希腊天文学家，约生于公元100年。关于地球与地球的运动，他提出了“（ D ）”理论。5、（A ）是波兰的天文学家。他不辞辛苦，克服困难，每天坚持观测天象，30年如一日，终于取得了可靠的数据，提出了“（C ）”，并在临终前出版了他的不朽名著天体运行论。A、哥白尼 B、托勒密 C、日心说 D、地心说6、（C ）有一位名叫傅科（）的物理学家，在家中研究摆的规律时偶然发现：将摆和它的支架放在一个圆形底盘上，将摆摆动起来并且慢慢地转动圆底盘时，摆摆动的方向并没有随着圆盘的转动而转动，而是基本不变。A、波兰 B、古希腊 C、法国 D、荷兰 7、地球自转的方向，正好与其它星体（太阳、星星等）（D ）（或顺时针）运动的方向相反，是（ C ）（或逆时针）。A、自西向南 B、自南向西 C、自西向东 D、自东向西二、 多项选择题。1、与地球自转相关联的现象有：（ABC）A、昼夜现象 B不同地区迎来黎明的时间相同C、看上去北极星不动 D、不同地区迎来黎明的时间不同2、昼夜现象与（B）和（C）的相对圆周运动有关。A、月亮 B、太阳 C、地球 D、恒星3、托马斯提出的主要观点是（ ADF）A、地球是球体 B、地球是球形的 C、地球是在运动，并且24小时自转一周D、地球处于宇宙中心，而且静止不动E、太阳是不动的，而且处于宇宙的中心，地球以及其他的行星都一起围绕太阳做圆周运动F、所有的日月星辰都绕着地球旋转，并且每天做一次圆周运动，因为人们看到的是这些天体每天都在有规律地东升西落4、哥白尼提出的主要观点是（ BCD ）。A、地球是球体 B、地球是球形的 C、地球是在运动，并且24小时自转一周D、地球处于宇宙中心，而且静止不动E、太阳是不动的，而且处于宇宙的中心，地球以及其他的行星都一起围绕太阳做圆周运动F、所有的日月星辰都绕着地球旋转，并且每天做一次圆周运动，因为人们看到的是这些天体每天都在有规律地东升西落三、填空题。 1、地球确实在（自转 ）和（公转 ）；证据不仅来自人造地球卫星的观测，还有来自观察或试验的多种现象。2、地球围绕（ 地轴）自转，（ 地轴 ）是倾斜的。3、公转过程中，地轴倾斜方向保持不变，因此形成了（四季 ）和（极昼极夜）现象。4、地球是围绕一个假想的轴在转动，称为（地轴）。北极星就处在（地轴）的延长线上。地球转动时，（地轴）始终倾斜着指向北极星，这就是北极星“不动”的秘密。因此，地球仪也都做成（倾斜）的样子。5、人们在观察远近不同的星星时产生的视觉上的相对位置差异（恒星周年视差 ），也能够证明地球在围绕太阳不停地转动。四、判断题。 1、昼夜交替现象有一种可能的解释。（） 2、在1851年，也就是“日心说”发表300年后，傅科根据他在日常生活中的发现，用实验证实了地球在自转。（） 3、在自转的地球上看到地球以外的其他星体（如太阳、星星等）东升西落，这其实正是地球与它们相反运动的结果。（ ） 4、人们在夜间观星时，发现一个特殊现象：北极星的位置好像始终没有变化，而其他的星星都围绕北极星在逆时针旋转。（ ） 5、人们在不同夜晚的同一时间观察星座时发现，天空中星座的位置会随着时间的推移逐渐由西向东移动，比如北斗七星就是如此。（ ）五、看图填空题。 1、世界时区图。 （81页图）这是一张世界时区图。从图中我们可以看出：人们以地球经线为标准，将地球分为（24 ）个时区。将通过英国伦敦格林尼治天文台的经线，定为（0 ）度经线。从0度经线向东180度属（东京 ），向西180度属（西京 ）。经线每隔15度为一个时区，相邻两个时区的时间就相差1小时。由于地球自转的方向是自西向东（或逆时针），也就意味着越是（东边 ）的时区，就越先迎来黎明。参与本物业的竣工验收，并在物业移交接管时，与甲方办理物业管理书面交接手续；本物业交付使用后的质量标准.说课标就是要把课程标准中的课程目标（三维目标）作为本课题教学的指导思想和教学依据，从课程论的高度驾驭教材和指导教学设计。Grass-roots governance according to law is an important foundation for promoting the construction of rule of law, but also the most basic development environment. 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