试析实验过程的三个阶段

实验是为了检验某种理论或假说而进行的某些操作或开展的某些活动，是积极干预被研究对象以便更充分地暴露对象特性的更高一级的观察方法。一般把实验过程分为实验准备、实验实施、实验评价三个阶段。     

电阻测量实验的拓展

电学实验的考查是以课本中实验为原型，在实验目的、实验原理、实验器材、实验步骤、数据处理以及实验组合等方面进行拓展、延伸、变化，使电学实验试题充满新意，源于课本而高于课本，要求能灵活运用直流电路知识，独立选择实验器材，设计实验电路，获得实验结果．     

无机化学实验改革探讨

通过分析无机化学实验中现存问题,提出了有关实验内容、实验方法、实验考核、实验管理手段等四个方面进行改革的初步构想。     

关于几个无机化学实验改时的探讨

本文探讨了一些无机化学实验的改革措施,包括了实验程序的创新,新材料及废旧物品在实验中的应用,以及创制了一些新颖的装置作为传统或暂缺装置的替代品,在教学实践中,这些改进措施证明了可以提高课程质量,而且可以降低实验器材及药品的消耗量,是经济可行的。     

例谈高考化学实验方案的设计

一个相对完整的化学实验方案一般包括下述内容：①实验名称;②实验目的;③实验原理;④实验用品（仪器、药品及规格）;⑤实验步骤（包括实验仪器的装配和操作）;⑥实验现象和记录及结果处理;⑦问题和讨论．     

十年高考物理实验统计与分析

一、十年高考实验分类统计 (一)学生实验的考查 1.互成角度的两个力的合成:1994年(考查弹簧秤的使用和二力合成) 2.练习使用打点计时器(没有考查过) 3.测定匀变速直线运动的加速度:1997年(沪考查现像分析、数据处理) 4.验证牛顿第二定律:1998年(结论分析) 5.研究平抛物体的运动: 1995年(考查表达式、数据处理。沪考查实验目的、实验原理、实验仪器、实验操作、条件控制) 6.动量守恒定律(没有考查)     

实验推动教学实践探求真知

我们先假设如下情境：老师甲说：“同学们，今天我们的晚餐是香脆大虾、水果沙拉等。”接着他会清楚地讲解每道菜的制作方法，同时给同学们展示每一道菜的图片，正当同学们兴趣盎然时，老师却说：“好了，今天的课讲完了，请大家回去认真复习，准备考试!”同样的课，老师乙会在讲台上亲自掌勺，给同学们演示每一道菜的烹调过程。学生们只能做馋涎欲滴的观众，他们不能参与制作，     

物理实验的设计与创新探析

所谓设计性实验就是在过去已学实验 (包括学生分组实验、演示实验及课后小实验 )的基础上应用已学的实验仪器 ,实验方法根据要求设计实验方案 .它涉及到对实验原理的认识及理解、实验器材的选取、步骤的合理安排、具体的实验操作、数据的分析处理及结论的得出等一系列知识能力 ,能有效地考查考生灵活运用基本知识及技能的能力 ,体现了“素质、创新”的主题 ,是高考命题较具活力的领域 .一、设计与创新的基本要求1 .实验基本原理是设计性实验的基础 .要研究实验 ,只有对实验目的 ,实验原理 ,实验器材的选择、安装、调试 ,实验操作、步骤 ,实…     

分析化学实验教学考核方式改革初探

在对现有分析化学实验教学考核方式的分析基础上，探索了基于过程的考核方式，指出采用计算机进行实验预习测试和综合考核，能使学生在思想上引起足够的重视，提高实验操作速度及规范性，可更真实地反映学生实验操作水平和实验成绩。     

注重对实验工艺的研究,创造先进稳定的实验环境

实验工艺的研究包括实验流程的设计、实验环境的设计、专用实验工装的设计等诸多的研究方面。在研究和开发新型专用实验教学设备的过程中，注重对实验工艺研究成果的运用是创造先进、稳定实验环境的重要环节。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

Western and Eastern culture differences in commercial field

The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

风的曲线

Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.