阅读下列材料，完成教学设计。
材料一动能与势能的相互转化物体自由下落或沿光滑斜面滑下时．重力对物体做正功，物体的重力势能减少。减少的重力势能到哪里去了?我们发现，在这些过程中，物体的速度增加了，表示物体的动能增加了。这说明，物体原来的重力势能转化成了动能。
原来具有一定速度的物体，由于惯性在空中竖直上升或沿光滑斜面上升，这时重力做负功，物体的速度减小，表示物体的动能减少了。但由于物体的高度增加，它的重力势能增加了。这说明，物体原来具有的动能转化成了重力势能。
材料二在只有重力或弹力做功的物体系统内，动能与势能可以互相转化，而总的机械能保持不变。这叫做机械能守恒定律。它是力学中的一条重要定律，是普遍的能量守恒定律的一种特殊情况。
根据上述材料，回答：
（1）设计一个关于机械能守恒定律内容和条件的教学导入。
（2）完成材料一部分的教学设计，内容包括学情分析和教学目标。

未分类题请阅读Passage2，完成第小题。Passage 2Results showed that at least a tenth of the Harvard first-year undergraduates polled admitted to having cheated on an exam prior to starting at the university， while almost half admitted to cheating on their homework. An anonymous survey by Harvard's newspaper has revealed a surprising pattern of academic dishonesty among students entering the US universities.The survey by The Harvard Crimson was emailed to the incoming first year undergraduates;1，600 students responded. Results showed that at least a tenth of the students polled admitted to having cheated on an exam prior to starting at the university， while almost half admitted to cheating on their homework.

未分类题He had an__________habit of emptying ash trays out of his upstairs window.

未分类题How many liaisons of sound are there in the sentence 'I called you half an hour ago'?

未分类题When you talk to your boss or to your friends， you use different words. We could analyze this phenomenon with__________.

未分类题请阅读Passage l。完成第21—25小题。Passage 1It's one of our common beliefs that mice are afraid of cats. Scientists have long known that even if a mouse has never seen a cat before， it is still able to detect chemical signals released from it and run away in fear. This has always been thought to be something that is hard-wired into a mouse s brain.But now Wendy Ingram， a graduate student at the University of California， Berkeley， has challenged this common sense. She has found a way to'cure' mice of their inborn fear of cats by infecting them with a parasite， reported the science journal Nature.The parasite， called Toxoplasma gondii， might sound unfamiliar to you， but the shocking fact is that up to one-third of people around the world are infected by it. This parasite can cause different diseases among humans， especially pregnant women——it is linked to blindness and the death of unborn babies.However， the parasite's effects on mice are unique. Ingram and her team measured how mice reacted to a cat's urine（尿） before and after it was infected by the parasite. They noted that normal mice stayed far away from the urine while mice that were infected with the parasite walked freely around the test area.But that's not all. The parasite was found to be more powerful than originally thought—even after researchers cured the mice of the infection. They no longer reacted with fear to a cat's smell，which could indicate that the infection has caused a permanent change in mice's brains.Why does a parasite change a mouse's brain instead of making it sick like it does to humans?The answer lies in evolution.'It's exciting scary to know how a parasite can manipulate a mouse's brain this way，' Ingram said. But she also finds it inspiring.'Typically if you have a bacterial infection， you go to a doctor and take antibiotics and the infection is cleared and you expect all the symptoms to also go away.'She said， but this study has proven that wrong.'This may have huge implications for infectious disease medicine.'The passage is mainly about__________. 查看材料

未分类题阅读材料．根据要求完成教学设计任务。材料一《普通高中物理课程标准（实验）》关于“电磁感应定律”的内容要求为：“收集资料，了解电磁感应现象的发现过程，体会人类探索自然规律的科学态度和科学精神。举例说明电磁感应在生活和生产中的应用。理解法拉第电磁感应定律。”材料二某版本高中物理教科书关于“法拉第电磁感应定律”的部分教学内容如下：穿过闭合导体回路的磁通量发生变化，其中就有感应电流。既然有感应电流．电路中就一定有电动势。如果电路没有闭合，这时虽然没有感应电流，电动势依然存在。在电磁感应现象中产生的电动势叫做感应电动势。产生感应电动势的那部分导体就相当于电源。感应电动势的大小跟哪些因素有关呢?在用导线切割磁感线产生的感应电流的实验中，导线运动的速度越快、磁体的磁场越强，产生的感应电流就越大：在向线圈中插入条形磁铁的实验中，磁铁的磁场越强、插入的速度越快．产生的感应电流就越大。这些经验向我们提示，感应电动势可能与磁通量变化的快慢有关，而磁通量变化的快慢可以用磁通量的变化率表示。材料三教学对象为高中二年级学生，学生已经学习了磁场、楞次定律等知识。（1）简述法拉第电磁感应定律的内容。（2）结合所给材料，完成“法拉第电磁感应定律”的教学设计，内容包括教学目标、教学过程。

未分类题某教师为了了解学生对力的概念的掌握与运用情况，设计了若干检测题，其中一题如下。甲、乙两人手拉手玩拔河游戏，结果甲胜乙败，那么甲乙两人谁受拉力大?【错解】因为甲胜乙，所以甲对乙的拉力比乙对甲的拉力大。就像拔河一样，甲方胜一定是甲方对乙方的拉力大。针对上述材料．回答下列问题：（1）分析学生答题错误可能是由哪些原因造成的。（2）针对其中由物理知识方面导致的错误，给出正确的引导，用于帮助学生学习。

未分类题关于振动和波动，下列说法错误的是（ ）。

未分类题在一静电场中，作一闭合曲面S，若有∮D·dS=0（式中D为电位移矢量），则S面内必定（ ）。

未分类题What‘s the overall goal of English teaching in basic education stage?

未分类题如果把发生在二十世纪八九十年代之交的“东欧剧变”比喻为“多米诺骨牌效应”，那么第一块“骨牌”就是（ ）。

未分类题一份清末衙门堂审记录中记载，“女子严阿苏，现年十六，与梁海相识月之初……十日，梁遇阿苏于路，因邀同行，为巡士盘获（抓获）”。官：“何时与梁相识?”严阿苏：“在途中相识，我中意他!”官：“此事汝母知否?”严阿苏：“此不干母亲事，且母亲亦任我自由择配。”……官（斥梁海）：“不凭媒妁之言，居然携少女同游，有伤风化。判将分别收押，听候核办。”这表明当时中国（ ）。

未分类题近代著名思想家钱玄同写道：“若从中华民国自身说，它是公历一九一一年十月十日产生的，那一日才是中华民国的真纪元……就中国而论，这日是国民做‘人’的第一日……”“这真是我们应该欢喜、应该庆贺的日子。”文中的国民独立做“人”是指（ ）。

未分类题20世纪70年代初，英国首相希思认为，“整个资本主义世界正在刮起狂风”，在这种情况下，英国不能“听任自己陷于孤立”，否则“前景的确将是黯淡的”。为此，英国（ ）。

未分类题报纸的产生、发展影响了中国社会的发展进程。西方传教士在广州办的中国第一份中文刊物《东西洋考每月统计传》，就曾发表了这样一段新闻：“英杰利之公会，甚推自主之理……倘国要旺相，必有自主之理。不然，民人无力，百工废，而士农工商未知尽力竭力矣”。这反映出近代外文报刊的创办（ ）。