2015综合测评题
2015年全国大学生电子设计竞赛综合测评题
综合测评注意事项
（1）综合测评于2015年8月24日8:00正式开始，8月24日15:00结束。
（2）本科组和高职高专组的综合测评队共用此题。
（3）综合测评以队为单位采用全封闭方式进行，现场规则按《综合测评纪律与规定》执行。（4）综合测评结束时，制作实物及《综合测评测试记录表》，由全国专家组委派的专家分别封存，交赛区保管。
多种波形产生电路
使用题目指定的综合测试板上的555芯片、74LS74芯片和一片通用四运放324芯片，设计制作一个频率可变的可输出方波I、方波II、三角波、正弦波I、
正弦波II的多种波形产生电路。给出方案设计、详细电路图和现场自测数据波
形(一律手写、3个同学签字、注明综合测试板编号)，与综合测试板一同上交。
1.设计制作要求
使用555时基电路产生频率为20kHz-50kHz的方波I作为信号源；利用此方
波I，可在四个通道输出4种波形：每通道输出方波II、三角波、正弦波I、正
弦波II中的一种波形，每通道输出的负载电阻均为600欧姆。
2.五种波形的设计要求
（1）使用555时基电路产生频率为20kHz-50kHz连续可调, 输出电压幅度
为1V的方波I；
（2）使用数字电路74LS74，产生频率为5kHz-10kHz连续可调，输出电压
幅度为1V的方波II；
（3）使用数字电路74LS74，产生频率为5kHz-10kHz连续可调，输出电压
幅度峰峰值为3V的三角波；
（4）产生输出频率为20kHz-30kHz连续可调，输出电压幅度峰峰值为3V
的正弦波I；
（5）产生输出频率为250kHz，输出电压幅度峰峰值为8V的正弦波II。
方波、三角波和正弦波输出波形应无明显失真（使用示波器测量时）。频率
误差不大于5%；通带内输出电压幅度峰峰值误差不大于5%。
3．电源只能选用+10V单电源，由稳压电源供给。不得使用额外电源。
4．要求预留方波I、方波II、三角波、正弦波I、正弦波II和电源的测试端子。
5．每通道输出的负载电阻600欧姆应标示清楚、置于明显位置，便于检查。
注意：不能外加555、74LS74和324芯片，不能使用除综合测试板上的芯片以外的其它任何器件或芯片。
说明
1.综合测评应在模数实验室进行，实验室应能提供常规仪器仪表、常用工具和电阻、电容、电位器等。
2.综合测评电路板检查后发给参赛队，原则上不允许参赛队更换电路板。
3．若综合测评电路板上已焊好的324、74LS74和555芯片被损坏，允许提供新的324、74LS74和555芯片，自行焊接，但要记录并酌情扣分；
4．提供324、74LS74和555芯片使用说明书。
综合测评实施办法
“综合测评”是全国大学生电子设计竞赛评审工作中的重要环节，是“一次竞赛二级评审”工作中全国专家组评审工作的一部分。“综合测评”的实施办法如下：
1．全国竞赛组委会委托各赛区竞赛组委会实施“综合测评”，并在全国专家组指导下完成组织和评测工作，届时全国专家组将委派专家参加。
2．综合测评的测试对象为赛区推荐上报全国评奖的优秀参赛队全体队员，以队为单位在各赛区以全封闭方式进行，测试现场必须相对集中。
3．综合测评采用设计制作方式，测评题目与评分标准由全国专家组统一制定，各队设计制作时间为2015年8月24日8:00～15:00。
4．综合测评使用的电路板及器件由全国竞赛组委会统一提供；电阻、电容、电位器等元件由各赛区实验室准备。
5．综合测评现场各队不能上网、不能使用手机。
6．各队综合测评作品在测试完毕后必须统一封存在赛区，以备复测。
7．“综合测评”成绩由全国专家组按统一的标准确定，按满分30分计入全国评审总分。
8．综合测评题目将在8月24日7:30左右发到各赛区专家组长的电子邮箱中，请注意接收。题目下载打印后复制，于8:00准时发给参加综合测试的各队。
综合测评需要的主要物品由全国竞赛组委会提前邮到各赛区组委会指定接收人，所寄主要物品必须在8月24日综合测试开始前1小时拆封，拆封前需由全国专家组委派专家负责查验。
综合测评参赛队设计制作结束后，各赛区组织综合测评专家组立即按综合测评题目和要求进行严格的测试记录。
各赛区组委会必须于2015年8月25日17:00点之前（以邮戳为准）将各队综合测评记录、电路图等材料以特快专递方式寄出或派专人报送全国竞赛组委会秘书处指定地址和收件人（见竞赛实施过程说明）。
9．全国专家组委派专家要按照“综合测评实施办法”和“综合测评纪律与规定”的各项要求，实时监督检查与记录，并作为综合测评的评分依据之一。
综合测评纪律与规定
1．各赛区推荐的优秀参赛队（以下简称推荐队）全体队员必须按统一时间参加综合测评，按时开始和结束综合测评。综合测评期间，参赛队学生可以自带并使用纸质图书资料，但不得携带电子资料，不得上网，不得使用手机，不得以任何方式与队外人员进行讨论交流。如发现教师参与、他人代做、抄袭及被抄袭、队与队之间交流、不按规定时间结束综合测评的，将取消其测评与全国评奖资格。
2．在综合测评期间，推荐队员的个人计算机（含掌上电脑和智能手机等）、移动式存储介质、开发装置或仿真器、“单片机最小系统板”、元器件和测试仪器等一律不得带入综合测评现场，否则取消测试资格。
全国大学生电子设计竞赛组织委员会
2015年8月10日
高考作文：百所名校2015年高考作文模拟题汇总(整理精校版)
高考作文：百所名校2015年高考作文模拟题汇总 作文辅导 1119 14:15 ：： 百所名校2015年高考作文模拟题汇总 （121）甘肃兰州一中2015年高三年级期中考试作文题 阅读下面的材料。根据要求写一篇不少于800字的文章。（60分） 有一个人要去远方旅行，把庭院交给他的朋友留守。院子里破土而出的草芽，朋友从不拔去。初春时，草芽健康成长，朋友发觉它像野兰。到了夏天，那草开花了，五瓣的小花氤氲着一缕缕的幽香，花形如林地里的那些兰花一样，只不过它是蜡黄色的。朋友带着一朵花和几片叶子，向研究植物的专家求证，得知这是蜡兰——兰花中的一个稀有品种，许多人穷尽一生都很难找到它，如果在城里的花市上，这种蜡兰一棵价值万元。 他打电话给远方的朋友报告这一喜讯，朋友惋惜地说：“其实它每年都破土而出，只是我认为它是一棵普通的野草，每次都是尖芽刚冒出就拔掉了。如果我能耐心地等它开花，这棵蜡兰早就被发现了。” 要求选好角度，确定立意，明确文体，自拟标题；不要套作，不得抄袭。 （122）浙江省重点中学协作体高三适应性测试作文题 阅读下面的材料，根据要求写一篇不少于800字的文章。（60分） 一棵在深山里长了好多年的大树，被修剪了枝叶后移植到城市新建的公园里。人们围着它，议论着。一个说：“没有这次修剪，它不会被人赏识的。要被人赏识，就要改变自己的生存环境！”一个说：“修枝剪叶，伤根破皮，到这里还要重新扎根生叶，还要适应环境，一定是要付出代价的啊！”一个说“是金子在哪里都会发光，何必要离开自己的故乡呢？……
读了这段文字，你有何感悟？请自选角度，自定立意，自选文体，自拟题目，写一篇不少于800字的文章。 要求：①文体特征鲜明。②不得抄袭和套作。 （123）银川一中2015年高三年级第三次月考作文题 阅读下面的一则名言，根据要求作文： 哲学家维特根斯坦说：“我贴在地面步行，不在云端跳舞。” 这句名言表达形象，意义深刻，它会引发我们不同的联想或感悟。请结合这句名言，选择一个角度，自定立意，自拟题目，自选文体，写篇不少于800字的文章。 （124）江苏省淮安市2015年高三一模考试作文题 根据以下材料，选取角度，自拟题目，写一篇不少于800字的文章；文体不限，诗歌除外。 我与朋友一起到海边游玩，花50元钱买了两大袋漂亮的贝壳，觉得十分合算。但很快就发现这两大袋贝壳成了压手的累赘。正头痛时，发现一位与我们一样手提两大袋贝壳的老太太正蹲下身来，用双手在挖一个沙坑，然后把两袋贝壳放进坑里。朋友忍不住逗她：“阿姨，您当着这么多人的面藏宝物，不怕被人偷走吗？”老太太一边往坑里填沙一边快活地说：“待会儿我走了你们就来偷吧！”朋友对我说：“要不，咱们也这样吧？”我摇摇头说：“跟那个坑比起来，我更愿意相信自己的手。”就这样我们一直拎着这两大袋压手的“宝贝”在海边戏水。说实在的，获得“宝贝”的喜悦渐渐被守卫“宝贝”的辛苦消磨殆尽。 回程路上，走到老太太的藏宝之地，我和朋友不由得停下脚步。趁人不注意时，我将手中的长柄伞猛地往下一戳，“嚓”的一声是金属碰到贝壳的声音！“还在！”我和朋友异口同声地喊出来。望着手中沉甸甸的“宝贝”，我忽然明白了很多…… （125）广东省韶关市2015年高三年级十校联考作文题 阅读下面的文字，根据要求作文。
2015高考模拟题(四)-24页word资料
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2015高考模拟题(四)
2015高考模拟题(四) 一、单项填空（共15小题，每小题1分，满分15分） 1. The manager calls on every employee to join in the program everyones contribution makes a difference. A. when B. what C. which D. where 2. It is high time that the manager the big company to his son. A. handed in B. handed out C. handed over D. handed down 3. the reason，young people should be taught how to behave themselves both in family and at school. A. Whichever B. Whatever C. Wherever D. However 4. Though to face a lot of difficulties，he showed no sigh of giving up and managed to get through these difficulties. A. forced B. being forced C. forcing D. having forced 5. rid of pressure in life，Mr. Li spent a great amount of time doing exercise in his spare time.
2015年语文高考模拟试卷及答案
高考模拟试卷 宝鸡铁一中曹泉 说明：本试卷系金台区试题大赛参赛试卷。时间，150分钟。满分150分。一，现代文阅读（12分，每小题4分） 彩色头发基因技术 你能想像一只绿色老鼠的样子吗?科学家最近通过基因变化技术使老鼠长出了绿色的毛，试验的成功让科学家们相信，将相关基因移植入毛囊可以改变毛发的颜色，这意味着对毛囊进 行基因变体疗法可能大有作为。 抗癌公司是美国加州圣迭戈的一家生物技术公司，这里的科学家将一种水母基因移植到老鼠的毛囊中，使老鼠长出了在蓝光下呈现荧光绿的毛发。该公司总裁罗伯特·霍夫曼说：“这些毛发之所以是绿色的，是因为其中有荧光绿色的蛋白质。”这种荧光绿蛋白质就是使水母在暗处发绿光的那种基因。霍夫曼将这种水母的基因移入一块剪下的老鼠皮上，他用一 种名叫胶原酶的物质将老鼠皮组织软化，胶原酶可使毛囊更容易接受水母的基因，然后将老 鼠皮放入培养液中。培养液含有一种腺病毒，这种病毒与平常引起感冒的腺病毒相似。该病 毒很快进入老鼠皮上的水母基因细胞中。霍夫曼采取措施使病毒迅速复制，这样病毒细胞就 可以将自己携带的基因成分栽入老鼠的细胞中。霍夫曼在显微镜下观察细胞的变化过程，他 发现，老鼠皮的毛囊中明显出现了绿色蛋白质的斑点，这是每根毛发生长的基础。此后，这块老鼠皮上80％的地方长出了绿色的毛。然后，霍夫曼将这块长有绿毛的老鼠皮移植到活老鼠缺少毛发的皮肤上，移植的毛发在老鼠身上不断生长，逐渐遍布全身。 目前，该研究最乐观的前景可能就是让灰白头发恢复成黑发。研究人员已通过基因疗法 使白老鼠长出了黑色的毛，这对于治疗灰白头发是重大进步。但这种基因变体技术还要在老鼠身上再做几年试验才能用于人类。科学家们认为，一旦人类掌握了关于头发颜色的基因，基因疗法就可以用于美发。黑头发是因为真黑素在发挥作用，红头发和褐色头发也都有其生成色素，但目前还没破解金发的分子构造。一旦科学家们发现了所有决定头发颜色的基因，那么人们就可以随心所欲地改变头发的颜色，只需激活或减少相关基因，而不是通过染色物质。 霍夫曼同时指出：“毛囊是个了不起的工具。”他相信基因工程能使毛囊产生任何形式的蛋白质，比如胰岛素和干扰素(一种免疫系统蛋白质)。小小的毛囊其实是个巨大的工厂。通过基因疗法，毛囊里不仅能长出健康的头发，还有可能承栽某些基因来治疗白化病、糖尿病、癌症等。实际上，把基因疗法用于美发要比治病困难得多。美发需要把头上所有的毛囊都进行处理，而治病只在几个毛囊上进行处理就可以了。(节选自《环球时报》) 1．根据文意，下列对文中的“相关基因”和“自己携带的基因成分”的理解，正确的一项是
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