求2011年大连市初中毕业升学考试物理答案(都考完了可以说了吧),主要是简答题26,综合题28(4),31题

26.在春天或秋天的清晨,有时会看到河面上方向上冒“白气”。请分析说明“白气”是如何产生的。

28.如图10所示,在探究“平面镜成像的特点”实验中,桌面上已给出的器材有:带支架的玻璃板、铅笔各—个;完全相同的蜡烛两个;白纸一张;火柴盒一盒。

(1)为完成实验,还需要的器材是
(2)放置玻璃板时,应该使玻璃板与水平桌面 。
(3)做完某次实验后,四个小组将收集和处理的信息记录在白纸上,如图所示。正确的是 。(只有一个选项正确,请将正确的选项的字母填写在横线上)
(4)实验中,看到点燃的蜡烛通过玻璃板成两个像,其中距离观察者较远的像较 (选填“亮”或“暗”)。远处的像是来自于蜡烛的入射光经过玻璃板 (只有一个选项正确,将正确选项的字母填在横线上)。
A.一次反射、一次折射形成的 B 两次反射、一次折射形成的
C.一次反射、丽次圻射形成的 D.两次反射、两次折射形成的

31.在探究“导体中的电流与导体电阻的关系”实验中,小明猜想导体中的电流还与导体两端的电压有关。实验室可供选择的器材如下:6V稳压电源、0~20Ω滑动变阻器、电流表、30Ω的定值电阻各一个;4Ω、5Ω、6Ω、10Ω、15Ω、20Ω、25Ω、30Ω的定值电阻各一个,导线若干。
(1) 画出实验电路图。
(2)本实验中,应该选择的电阻分别为:
(3)使用某个电阻做实验时,闭合开关后,发现电流表无示数,电压表示数是6V,则电路故障是 (电路只有一处故障)
(4)本实验要保持电阻两端电压相同,小明将电压选择为某值Uo,但实验中发现更换电阻后,无法使每个电阻两端的电压都Uo,他更改了电压值U才完成实验。
小明在学习了欧姆定律之后,他才知道本实验中控制的电压值Uo应该在 V至
V范围内选择。

26.夏天气温很高,河水蒸发变成水蒸气,悬于河面上方。夜晚温度降低,清晨时环境温度很低,水蒸气放热,液化成小水滴,即白气。
28.(1)刻度尺(2)垂直(3)选对称的那个图。(4)选C
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第1个回答  2011-07-08
http://wenku.baidu.com/view/d49d4dfd04a1b0717fd5dd71.html
这是你的答案
我想要你的试卷 完整版
我的qq693369606 谢谢了
第2个回答  2011-06-28
China Refrigeration 2004 list of academic exchange activities

References: 1K. D. C, erdseyerandH. Knlse. C ~ pacitymodulationofheatpumpythemea/18ofparatacondensationofrefrigerantmix. ture, IEAHeatpumpcenternewsletter. InternationalEnergyAgency, 1989,franklin marshall femme,7 (3) :245-2562HaiderandImam. Simulationresultsforarlair - condi ~ orangsystemwithsec0 coffee refrigerantloops, HeatpumpandRg ~ ig. erationsystemsDesign, AnalysisandAppli8eationsAmericanSocietyofMechanicalEngineers. AdvancedEnergySystemsDi. visionAES, 1995,34 (1) :59-663 Yang Zhao. Air-conditioning heat pump system capacity of adjust the concentration of mixture qualitative alternative energy research and R22: [PhD thesis]. Tianjin: Tianjin University Graduate School, 1995.4You, Ying. Newrefrigeration / heatpumpsystemofcontinuouscapacitycontrolwit} lNARMS. EnergyandEnviromrtentPro. ceedingsoftheInternationalConferenceonEnergyandEnviron. ment,abercrombie paris, ICEE1996.331 ~ 335, e ≮ 44441. Bamboo cane tear} o-? 11-2004, China Refrigeration number of academic exchange activities in the name of the main contents of the list of time and place of contact telephone air conditioning building energy simulation analysis of academic exchanges, air-conditioning system, device simulation and 01 applications, air-conditioning control system simulation, CFD technology and the flow will be l8 March 19th, Beijing Jiang billion 010-62789761 applications, CAD technology and engineering 022 004 seminars space cooling refrigeration space technology seminars in March Beijing Yang Jianhui 010-6255179603 refrigeration Germany-German workshop on standardization discussion and cooperation in air-conditioning standard on April 7 Shanghai Yang Yifan 010-68475543 20th International Cryogenic Engineering in May 1104 the latest technology in low-temperature exchange Beijing Cheng Zhang Liang 010-62554669 Second Asian Conference-14th May 1205 Refrigeration and Air Conditioning New refrigeration and air conditioning Asia Science & Technology Exchange Beijing Jing Hua dry 010-68420686 International Conference 9-13 cold medicine / Biology, July 1506 cold medicine, biological research and application of Beijing Zhao Gang 0551-3607346 National Conference -19 HVAC indoor air study environment, various types of HVAC technology in building applications in August 1007, HVAC air conditioning and new technology, new equipment operation in Lanzhou Zhao Wende 010-84284720 application will be -14 and prospects of biomedical and low temperature low temperature preservation of biological, medical and related equipment of the third quarter of Beijing Han Ying 010-669322 [) 008 instrument research and development status and development will discuss 2004 national air conditioners, electric ice designs intelligent control and energy saving technology innovation cF. Qingdao Korea for the third quarter wedge 010-6303736709 box (cabinet) and the compressor 10 academic exchange Cs alternative technology exchange PSA PSA will exchange the latest technical development side of the third quarter of Chengdu Jin O571-85372.5; 222004,abercrombie france, China Refrigeration air conditioning refrigeration and air conditioning technology in the application, refrigeration and air conditioning to be determined in November the new technology Qiu Zhongyue 010-68715723l1 Conference and 18th groups will be technical,abercrombie paris ouverture, application and prospect of new members of the General Assembly equipment refrigeration equipment automation technology, food processing, manufacturing, storage and refrigeration equipment industry since 12 fourth quarter of Beijing Lv Jimin 010-63565546 application and development seminars and development of automation technology seminar -48--
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第3个回答  2011-07-03
水蒸气 气话
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