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。",{"optionId":182,"optionTitle":183,"optionSubtitle":11,"titleIndex":167,"indexName":11},345897,"3．如图所示，新中国成立70周年阅兵仪式上，直升机编队组成“70”字样飞过天安门上空。\t甲、乙分别是编队中的两架直升机，已知甲直升机的速度是160km\u002Fh，则乙直升机的速度\t应为           m\u002Fs。",{"subjectId":185,"subjectTitle":186,"subjectSubtitle":11,"subjectType":187,"titleIndex":167,"indexName":11,"subjectTypeName":188,"optionList":11},112485,"4．如图是小明家规范电路的简化电路图，根据电路图，小明判断出a导线是火线，b导线是\t零线，请你写出小明判断的依据：                               。（写出一条即可）",15,"备注说明",{"subjectId":190,"subjectTitle":191,"subjectSubtitle":11,"subjectType":16,"titleIndex":34,"indexName":11,"subjectTypeName":156,"optionList":192},112486,"5．通电直导线在磁场中受到磁场力的方向可以用左手定则来判断：伸开左手，使大拇指与\t其余四个手指垂直，并且都与手掌在同一个平面内，让磁感线垂直穿过掌心，并使四指\t指向电流的方向，这时大拇指所指的方向就是通电直导线所受磁场力的方向，如图甲所\t示。请你判断：图乙中的线圈是                选填“顺时针”或“逆时针”）转动的。6．显微镜主要由物镜和目镜两组凸透镜组成，被观察的细微物体先在物镜中成一个像，这\t个像就相当于目镜中的物体，然后它在目镜中再次成像。F1为物镜的焦点，F2为目镜的\t焦点，图中已画出细小物体AB在物镜中所成像A′B′的光路图，以及A′B′射向目\t镜的两条光线，请你画出A′B′在目镜中所成的像及光路图。",[193,196,199],{"optionId":194,"optionTitle":195,"optionSubtitle":11,"titleIndex":16,"indexName":11},345898,"7．可燃冰的热值很高，若完全燃烧1g的可燃冰，可使2kg、20℃的水温度升高50℃，则可\t燃冰的热值为            J\u002Fkg。【不计热损失，水的比热容是4.2×103J\u002F（kg·℃）】",{"optionId":197,"optionTitle":198,"optionSubtitle":11,"titleIndex":15,"indexName":11},345899,"8．为了测量体积为100cm3的物块密度，小明把物块放在天平左盘，在右盘加80g砝码，再\t将游码移到图示位置天平正好平衡。则该物块的密度为             g\u002Fcm3。",{"optionId":200,"optionTitle":201,"optionSubtitle":11,"titleIndex":167,"indexName":11},345900,"9．把长短相同、粗细不同的两根镍铬合金线接入如图所示的电路中，则闭合开关S后，粗\t导线两端的电压             细导线两端的电压。（选填“大于”、“等于”或“小于”）",{"subjectId":203,"subjectTitle":204,"subjectSubtitle":11,"subjectType":16,"titleIndex":135,"indexName":11,"subjectTypeName":156,"optionList":205},112487,"10．在如图所示电路中，R1＝10Ω，R2＝20Ω，闭合开关后，电流表的示数为0.3A，则通电\t1 min的时间，R1和R2共产生             J的热量。",[206,209,212,215,218,221,224,227,231,234,237,241,244,247,250,253,257,261,265,269,273,277,280],{"optionId":207,"optionTitle":208,"optionSubtitle":11,"titleIndex":16,"indexName":11},345901,"二、选择题：（每题2分，共14分。以下各题所给出的四个选项中，只有一个选项是符\t 合题意的。）",{"optionId":210,"optionTitle":211,"optionSubtitle":11,"titleIndex":15,"indexName":11},345902,"11．下列所估测的数据中符合生活实际的是(     )",{"optionId":213,"optionTitle":214,"optionSubtitle":11,"titleIndex":167,"indexName":11},345903,"A．中学生跑完50 m用时4s　　　　　　　　　B．家庭电冰箱正常工作电流约为5A",{"optionId":216,"optionTitle":217,"optionSubtitle":11,"titleIndex":34,"indexName":11},345904,"C．刚从冰箱冷藏室拿出的鸡蛋温度约为3℃　　D．普通牙刷的长度约为10cm",{"optionId":219,"optionTitle":220,"optionSubtitle":11,"titleIndex":135,"indexName":11},345905,"12．下列一些医学措施和用到的器械中都包含着相关的物理知识，其中说法错误的是",{"optionId":222,"optionTitle":223,"optionSubtitle":11,"titleIndex":13,"indexName":11},345906,"(       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。",{"optionId":334,"optionTitle":335,"optionSubtitle":11,"titleIndex":256,"indexName":11},345939,"实验次数",{"optionId":337,"optionTitle":338,"optionSubtitle":11,"titleIndex":260,"indexName":11},345940,"物到镜面距离\u002Fcm",{"optionId":340,"optionTitle":341,"optionSubtitle":11,"titleIndex":264,"indexName":11},345941,"像到镜面距离\u002Fcm",{"optionId":343,"optionTitle":344,"optionSubtitle":11,"titleIndex":268,"indexName":11},345942,"1",{"optionId":346,"optionTitle":347,"optionSubtitle":11,"titleIndex":272,"indexName":11},345943,"4.65",{"optionId":349,"optionTitle":347,"optionSubtitle":11,"titleIndex":276,"indexName":11},345944,{"optionId":351,"optionTitle":352,"optionSubtitle":11,"titleIndex":42,"indexName":11},345945,"2",{"optionId":354,"optionTitle":355,"optionSubtitle":11,"titleIndex":283,"indexName":11},345946,"3.12",{"optionId":357,"optionTitle":358,"optionSubtitle":11,"titleIndex":359,"indexName":11},345947,"3.13",24,{"optionId":361,"optionTitle":362,"optionSubtitle":11,"titleIndex":363,"indexName":11},345948,"3",25,{"optionId":365,"optionTitle":366,"optionSubtitle":11,"titleIndex":367,"indexName":11},345949,"     1.53[来源:学。科。网Z。X。X。K]",26,{"optionId":369,"optionTitle":370,"optionSubtitle":11,"titleIndex":371,"indexName":11},345950,"1.52",27,{"subjectId":373,"subjectTitle":374,"subjectSubtitle":11,"subjectType":16,"titleIndex":31,"indexName":11,"subjectTypeName":156,"optionList":375},112489,"19．在“探究杠杆平衡条件”的实验中：",[376,379],{"optionId":377,"optionTitle":378,"optionSubtitle":11,"titleIndex":16,"indexName":11},345951,"（1）调节杠杆平衡后，在图甲所示的A位置挂上2个钩码，可在B位置挂上       个钩码，\t  使杠杆在水平位置平衡。",{"optionId":380,"optionTitle":381,"optionSubtitle":11,"titleIndex":15,"indexName":11},345952,"（2）某同学采用如图乙所示装置进行实验，发现总是无法得到课本上所给出的平衡条件，\t  原因是                                            。",{"subjectId":383,"subjectTitle":384,"subjectSubtitle":11,"subjectType":187,"titleIndex":230,"indexName":11,"subjectTypeName":188,"optionList":11},112490,"20．某同学利用如图甲所示的电路测量定值电阻R0的电功率，已知电源电压为6V，电流表\t 有0～0.6A和0～3A两个量程，电压表有0～3V和0～15V两个量程，滑动变阻器的铭\t 牌上标有“1A，20Ω”字样。",{"subjectId":386,"subjectTitle":387,"subjectSubtitle":11,"subjectType":16,"titleIndex":62,"indexName":11,"subjectTypeName":156,"optionList":388},112491,"（1）连接电路时，滑动变阻器的滑片P应处于            端（选填“a”或“b”）。",[389,392,395],{"optionId":390,"optionTitle":391,"optionSubtitle":11,"titleIndex":16,"indexName":11},345953,"（2）闭合开关，调节滑动变阻器，电流表和电压表的示数如图乙所示，则此时电阻R0的电\t  功率为            W。",{"optionId":393,"optionTitle":394,"optionSubtitle":11,"titleIndex":15,"indexName":11},345954,"（3）小明发现，闭合开关后，移动滑片P，电流表和电压表的指针能同时达到满刻度线。则\t  该实验中R0的电功率与电流的关系图象可能是           。",{"optionId":396,"optionTitle":397,"optionSubtitle":11,"titleIndex":167,"indexName":11},345955,"　",{"subjectId":399,"subjectTitle":400,"subjectSubtitle":11,"subjectType":187,"titleIndex":22,"indexName":11,"subjectTypeName":188,"optionList":11},112492,"[来源:学,科,网Z,X,X,K]",{"subjectId":402,"subjectTitle":403,"subjectSubtitle":11,"subjectType":16,"titleIndex":240,"indexName":11,"subjectTypeName":156,"optionList":404},112493,"四、计算题（第21题6分，第22题6分，第23题8分，共20分）",[405,408,411,414],{"optionId":406,"optionTitle":407,"optionSubtitle":11,"titleIndex":16,"indexName":11},345956,"21．有一台直流电动机在220V的电压下工作时，电流为35A，用它来匀速提升质量为1400kg\t的货物，在2s内提升了lm，设电动机输出的能量全部用来提升货物。问：",{"optionId":409,"optionTitle":410,"optionSubtitle":11,"titleIndex":15,"indexName":11},345957,"（1）电动机对货物的拉力是多少？",{"optionId":412,"optionTitle":413,"optionSubtitle":11,"titleIndex":167,"indexName":11},345958,"（2）2s内电动机对货物做功的功率是多少？ ",{"optionId":415,"optionTitle":416,"optionSubtitle":11,"titleIndex":34,"indexName":11},345959,"（3）这期间电动机的效率是多少？[来源:Zxxk.Com]",{"subjectId":418,"subjectTitle":419,"subjectSubtitle":11,"subjectType":16,"titleIndex":52,"indexName":11,"subjectTypeName":156,"optionList":420},112494,"22．如图所示，实心正方体铜块A重89N，其边长为10 cm，放置在水平桌面上的平底薄壁\t 容器底面积为0.02m2，内装100N的水。现将实心铜块A系在弹簧测力计挂钩上，并把\t 它完全浸没于容器内的水中（水未溢出，铜块未接触容器底部）。求：",[421,424,427],{"optionId":422,"optionTitle":423,"optionSubtitle":11,"titleIndex":16,"indexName":11},345960,"（1）若将铜块A静置于水平桌面上，它对水平桌面的压强是多少？",{"optionId":425,"optionTitle":426,"optionSubtitle":11,"titleIndex":15,"indexName":11},345961,"（2）将铜块A浸入水中，当浸入体积为其一半时，弹簧测力计的示数是多少？",{"optionId":428,"optionTitle":429,"optionSubtitle":11,"titleIndex":167,"indexName":11},345962,"（3）铜块A完全浸没于水中与未放铜块A相比，水对容器底的压强增大了多少？",{"subjectId":431,"subjectTitle":432,"subjectSubtitle":11,"subjectType":16,"titleIndex":23,"indexName":11,"subjectTypeName":156,"optionList":433},112495,"23．如图所示电路中，电源电压为6V，电阻R1为10Ω，R2略大于10Ω，滑动变阻器的阻\t 值变化范围为0～20Ω。求：",[434,437],{"optionId":435,"optionTitle":436,"optionSubtitle":11,"titleIndex":16,"indexName":11},345963,"（1）当滑动变阻器的滑片P从最左端a滑向最右端b时，R1两端电压、电流的变化范围分\t  别是多少？",{"optionId":438,"optionTitle":439,"optionSubtitle":11,"titleIndex":15,"indexName":11},345964,"（2）当滑动变阻器的滑片P滑到某一位置时，电流表A1的示数为0.3A，电流表A2的示数\t  为0.25A，则电阻R2的阻值为多大？"]