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压力与压强1京考解读│京考解读考纲要求1.压力；2.压强的概念；3.压强的单位；4.运用压强公式解决有关问题近三年年份题型分值难易程度考点北京市2009单选2分易生活中增大或减小压强的方法中考考20100分查情况2011单选2分易生活中增大或减小压强的方法预测2012预计2012年会以选择题的形式出现，主要考查的是生活中增大或减小压强的方法。能力考查主要体现为以杠杆、滑轮为模型，与浮力、机械效率相结合的综合题。压力与压强这部...
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第四章物态变化视频1不可靠！2§4.1温度计一、温度计的原理及构造二、温度计的刻度划分三、温度计的正确使用四、体温计3一、温度计的原理及构造1、液体温度计的测量原理液体的热胀冷缩的性质实验用温度计2、液体温度计的构造外壳、液体泡、毛细管、刻度4二、温度计的刻度划分1、摄氏温度的规定50℃100℃9302010※0度和100度之间分成100等分,每一等分为摄氏温度的一个单位，叫做1摄氏度。1、摄氏温度的规定①0摄氏度②100摄氏度...
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7.2怎样比较运动的快慢1步行人和骑车人同时由同地出发，没有钟表，怎样比较它们运动的快慢？看谁在前面----即在相等的时间内，走的路程远的人运动得快2在校运动会上，初三（3）班甲、乙、丙、丁四位同学报名参加百米赛跑，他们的参赛成绩如下表所示，则获得本组第一名的是_____同学。参赛者甲乙丙丁成绩13”613”113”913”4乙理论依据是：通过的路程相等时所用时间越少，运动越快。3百米运动员的成绩为12s，24届奥运会万米冠军...
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