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        1. ͋ϺW(xu)(x)Сfİְ糿7c(din){܇(ƽٶȞ60ǧףr(sh))ļl(f)s45ǧ׵ؑcC(j)(chng)˕r(sh)Ҏ(gu)_(d)C(j)(chng)ĕr(sh)gHʣ90犣7c(din)30֕r(sh)Сfl(f)F(xin)ˎCæְַ֪ͨͬr(sh)܇40ǧףr(sh)ƽٶֱC(j)(chng)(Ԓϳ܇ĕr(sh)gԲӋ(j))cͬr(sh)ְֽӵԒ^m(x)C(j)(chng)5犺󷵻СfǰC(j)(chng)(Cĕr(sh)gԲӋ(j))Ո(qng)(wn)
          1O(sh)Сf7c(din)30ֳl(f)(jng)^(gu)xСr(sh)cְtcְr(sh)Сf_______ǧְַ__________ǧ(úxĴ(sh)ʽʾ)
          2СfİְܷҎ(gu)ĕr(sh)g(ni)sC(j)(chng)
          140 x,  2
          ⣺140 x,              4
          2⣺O(sh)Сf7c(din)30ֳl(f)(jng)^(gu)xСr(sh)cְ
          (j)}    .6
                     8
          Сr(sh)=83<90   .9
          СfİְҎ(gu)ĕr(sh)g(ni)sC(j)(chng)       .10
          1O(sh)Сf7c(din)30ֳl(f)(jng)^(gu)xСr(sh)cְtcְr(sh)Сf40 xǧְַ 60x-5ǧף
          2O(sh)Сf7c(din)30ֳl(f)(jng)^(gu)xСr(sh)cְ·̺͕r(sh)gP(gun)ϵг⣮
          (x)(c)ϵд
          P(gun)(x)}

          ĿД(sh)W(xu) (li)ԴԔ }

          һ̵QijNbNÿb(bio)r(ji)5۳̝20Ԫ(bio)r(ji)8۳ӯ40Ԫ
          (1) ÿbĘ(bio)r(ji)ǶԪ?
          (2) ÿbijɱǶԪ
          (3) 鱣C̝ܴ?

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          ĿД(sh)W(xu) (li)ԴԔ }

          P(gun)ķĽؓ(f)(sh)tȡֵ        

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          ĿД(sh)W(xu) (li)ԴԔ }

          ij_(ki)չW(xu)(yu)ُ(gu)(dng)һُ(gu)^(gu)200Ԫһɾۃ(yu)ݣ^(gu)200Ԫ200Ԫ㣬^(gu)200ԪIJְ㣮
          С}1:ͬW(xu)һُ(gu)(bio)r(ji)Ŀ͞100Ԫ踶             Ԫ
          С}2:ͬW(xu)һُ(gu)(bio)r(ji)Ŀ͞xԪ踶             Ԫ
          С}3:ͬW(xu)һȥُ(gu)63Ԫڶȥُ(gu)˰ۃ(yu)鿴IĶr(ji)l(f)F(xin)ɴι(ji)s37ԪԓW(xu)ڶُ(gu)(sh)HԪ

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          ĿД(sh)W(xu) (li)ԴԔ x}

          ҈DһKƽ߅εرֳ4KСƽ߅ΣÁ(li)NֲtS{(ln)ķNͬɫĻзNֲtS{(ln)ɫܵصeքe20m230 m236 m2tNֲɫصe飨
          A 46m2B 50m2C54m2D60m2

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          ĿД(sh)W(xu) (li)ԴԔ }

          һ(g)߅εă(ni)ǺͱǺ͵6180@(g)߅ε߅(sh)

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          ĿД(sh)W(xu) (li)ԴԔ }

          (dng)            r(sh)(sh)ʽȴ(sh)ʽ31

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          ĿД(sh)W(xu) (li)ԴԔ }

          ̣ⷽ         

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          ĿД(sh)W(xu) (li)ԴԔ x}

          ǷĽt
          ABCD

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          ͬ(x)(c)