2022 英语周报 高考 外研 11答案

3.(1)C(2分)E(2分)(2)如图所示(2分(3左(2分(4)灯丝电阻(率)随盖度升高而增大(2分5)0.58(0.56~0,60,3分)【解析】(1)由P=U得小灯泡的额定电流为0.5A,则电流表选C;为方便实验操作,滑动变阻器应选E。(2小灯泡正常发光时电阻Rya-40.6~60,1=190=22.2>,则电流表采用外接法,描绘小灯泡两端的U-I图象,电压与电流从零开始变化,则滑动变阻器应采用分压接法3)为保证实验安全,在闭合开关前应使小灯泡两端电压为零,因此滑动变阻器的滑片应置于最左端。(4)因小灯泡电阻随温度的升高而增大故图象上的点与坐标原点连线的斜率应越来越大,所以图象发生了5)可把电源等效为电动势为4V、内阻为10的电源,设每个小灯泡两端电压为U,则电流与每个小灯泡两端电压的关系式为2U=Elr,即2U=4-10r在图中作出小灯泡两端电压与电流的关系图线,如图所示,交点的纵坐标吧为小灯泡的实际工作电压,为0.58V0203040.5

第四部分写作第一节短文改错As New Years Day approached, my classmates and Idecided A do something special to give our motherland aNew Year gift. After adiscussion, we agreed oncarrying out a flash mob singingtesong"Me and MyMotherland"at Beijing West Railway StationOn theearlierearly morning of the day, we set out for theequlpmentsstation. After setting up theequipmen’took a deepbreathbutand began to sing. Meanwhilemy classmates singsangtogether with me, playing the musical instruments,whichgot the atmosphere warmed up. Many passers-by also joinedin us, waving national flags. The flash mob lit everyone'sm us, waving national flags. The flash mob liteveryone strueove for our country. It wasa meaningful New Yeartrul

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