衡中同卷全国押题卷英语（二）答案

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FIFA is a non-profit organizalion which describesit as an international governing body of association football aritselfefootballIthighesvein body offooball.Football is likey the most popurhethedrawingbillion of television viewers every tournament.billionsThe FFA World Cup isridevery four years.Thefirs world cup as organidUrug)1inThirteen nations participated in it for the first time.Uruguay wins the World Cup defeating Argentina n henwonThe inaugural edition,hold in 1930,was contested as a final toumament of only thirteen teams invited by theorgamzeheldorganizatSince then,the World Cup has experienced successive expansions,involve over 200 teams to around the world.involvingfrom拉面名，4

23.(1)B(2分)(2)5.0(1分)10.0(1分)(3)3(2分)(4)3U(2分)-尽2分)3解析：(1)为了保证电路安全，闭合开关前电阻箱R:接入电路的阻值应为电阻箱的最大阻值，电阻箱R2应调到最大，选项B正确.(2)由题图乙所示电阻箱可知，电阻箱的示数为：0×100n十0×10n十5×1n十0×0.1n=52:根据并联电路的电压相等1，R=三I,R,所以R,=2R=100(3)改装后的电流表的量程为原来的3倍，即为3I·(④)根据闭合电路欧姆定律E=3IR 31(r R),其中R=三R,得到R=E-I(r R),所以=E,得到E=3U,r=-R,