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СW(xu)}c}˼·

r(sh)g2024-07-09 10:12:52 С ҪͶ
  • P(gun)]

2016СW(xu)}c}˼·

ˎW(xu)Мʂ؅2016СԇYJBYSСP(gun)СW(xu)}c}˼·gӭϣW(xu)俼!˽P(gun)ϢՈmP(gun)ע҂îI(y)ӖW(wng)!

2016СW(xu)}c}˼·

1.ӯ̝(wn)}

һČijN˜ʷֽMa(chn)һNYһN˜ʷֽM֮a(chn)һNYڷֽMĘ˜ʲͬɽYIJP(gun)ϵֽMĽMĿ

˼·ȌɷN䷽M(jn)б^ژ˜ʵIJɽY׃@(g)P(gun)ϵӷĿݔȻ}Ŀ

һһβ;

ʽݔ=(+㔵)÷ɴÿݔIJ

ڮɴζ;

ʽݔ=(^һ^С)÷ɴÿݔIJ

ۮɴζ;

ʽݔ=(^㔵һ^С㔵)÷ɴÿݔIJ

c(din)ͿĽMDz׃

P(gun)I(wn)}_ͿĽM

2.̆(wn)}

ʽ

ٹ=Ч×r(sh)g

ڹЧ=÷r(sh)g

۹r(sh)g=÷Ч

˼·

ټO“1”(Ϳo(w)P(gun));

ڼOһ(g)Ĕ鹤(һɹÕr(sh)gС)(g)P(gun)ϵԺ(jin)εرʾЧʼr(sh)g

P(gun)I(wn)}_r(sh)gЧgăɃɌP(gun)ϵ

3.׺e

˼·

һЩeӋֱ\ùʽrһҪDM(jn)иaƽDֽ׃دBʹҎtĈD׃?yu)ҎtĈDM(jn)Ӌ;ҪպӛһЩҎeҎ

÷

1.Bo(xin)

2.õȵ׵ȸߵăɂ(g)e

3.đO(Щc(din)O}Ŀf(shu)c(din)}r(sh)ɰc(din)Oλ)

4.Ҏ

ٵֱ֪һl߅e(б߅ƽ4ڵֱεe)

ΌǾ(xin)B(xin)e

ۈAeռe78.5%

4.Cг

г̆(wn)}оw\(dng)оwٶr(sh)g·֮gP(gun)ϵ

ʽ·=ٶ×r(sh)g;·÷r(sh)g=ٶ;·÷ٶ=r(sh)g

P(gun)I(wn)}_\(dng)^(gu)еλúͷ

(wn)}ٶȺ×r(sh)g=·(Ո(xi)ʽ)

׷(wn)}׷r(sh)g=·̲÷ٶȲ((xi)ʽ)

ˮ(wn)}ˮг=(+ˮ)×ˮr(sh)g

ˮг=(-ˮ)×ˮr(sh)g

ˮٶ=+ˮ

ˮٶ=-ˮ

oˮٶ=(ˮٶ+ˮٶ)÷2

ˮ =(ˮٶ-ˮٶ)÷2

ˮ(wn)}P(gun)IǴ_w\(dng)ٶϹʽ

^(gu)(wn)}P(gun)IǴ_w\(dng)·Ϲʽ

Ҫ(hu)(xin)ΈD

}֪ͣ·(·׷·)r(sh)g(r(sh)g׷r(sh)g)ٶ(ٶȺٶȲ)ɂ(g)(g)

5.uͬ\(wn)}

uͬ\(wn)}ַQ(chng)ÓQ(wn)}O(wn)}ǰѼOeDzÓQ(li);

˼·

ټOOijNF(׺һӻҺͼһ)

ڼOl(f)˺}ĿlͬIJҳ@(g)Ƕ;

ÿ(g)ɵIJǹ̶ĶҳF@(g)ԭ;

ٸ@ɂ(g)m{ȥFIJ

ʽ

ٰuOӣu=(_×^——_)÷(_——u_)

ڰӼOuÔ=(_һu_×^)÷(_һu_)

P(gun)I(wn)}ҳIJcλIJ

г̆(wn)}

г̆(wn)}СW(xu)W׃һ(g)(zhun)}ՓڊWِ߀“С”W(xu)ԇзdzҪĵλг̆(wn)}а܇(ch)^(gu)ˮд;܇(ch)C׷h(hun)гг̵ȵÿһ(li)(wn)}Լc(din)QҲͬг̆(wn)}o(w)Փô׃x_(ki)“(g)(g)P(gun)ϵ”

@(g)ǣ ·(s)ٶ(v)r(sh)g(t)

1.(jin)г̣ · = ٶ × r(sh)g

2.(wn)} ·̺ = ٶȺ × r(sh)g

3.׷(wn)} ·̲ = ٶȲ × r(sh)g

˼·

ټO“1”(Ϳo(w)P(gun));

ڼOһ(g)Ĕ鹤(һɹÕr(sh)gС)(g)P(gun)ϵԺ(jin)εرʾЧʼr(sh)g.

P(gun)I(wn)}_r(sh)gЧgăɃɌP(gun)ϵ

(jng)򞺆(jin)uϾñط־ñغ

ΰס@(g)Լ֮gNP(gun)ϵ͕(hu )l(f)FQг̆(wn)}߀кܶ෽ѭ

“г̆(wn)}”(sh)HҊ(jin)“г”

1мͬr(sh)ͬسl(f)@һ(g)ͬc౳ÿ40ÿ38ÿ36;׺3犺ͱ(wn)@(g)ԵL(chng)Ƕ?

@(g)г̵Ć(wn)}Ƀɂ(g)һ(g)׷M}Ŀoėlֻ(g)˵ٶԼһ(g)“3”ĕr(sh)g

һ(g)3犵ĕr(sh)g·̺͞(40+36)×3=228()

һ(g)׷@228_(ki)ʼĕr(sh)g˵ٶȲɵ׷^(gu)ĕr(sh)g228÷(38-36)=114()

ڶ(g)114Ҷһȫ

ԻL(chng)(40+38)×114=8892()

҂@һ(g)г̆(wn)}ֽ(g)(jin)εĆ(wn)}ʹ}˼·

֮г̆(wn)}c(din)Ҳyc(din)ֻҪ“(g)”֮g“(g)P(gun)ϵ”Qг̆(wn)}y!

̆(wn)}

̆(wn)}ҪоЧʺ͹r(sh)g֮gP(gun)ϵ@(li)(wn)}֪loľwֻ“һ헹”“һK”“һlˮ”“һ”ڽ}r(sh)Æλ“1”ʾ

𹤳̆(wn)}P(gun)Iǰѹ“1”@Чʾǹr(sh)gĵ(ʾλr(sh)gɹĎ׷֮)M(jn)ͿԸЧr(sh)g֮gP(gun)ϵгʽ

Ч×r(sh)g=

÷r(sh)g=Ч

÷Ч=r(sh)g

1)һת6Сr(sh)Ҫ8Сr(sh)ɡFڃ˺΄(w)r(sh)ױҶ24(g)@жق(g)?

}˼·

O1tÿСr(sh)1/6ÿСr(sh)1/8ױÿСr(sh)(1/6-1/8)˺r(sh)ÿСr(sh)(1/6+1/8)˺Ҫ[1÷(1/6+1/8)]Сr(sh)@(g)r(sh)gױҶ24(g)

(1)ÿСr(sh)ױҶ?

24÷[1÷(1/6+1/8)]=7((g))

(2)@жق(g)?

7÷(1/6-1/8)=168((g))

@}߀һNӋ㣺

˺΄(w)r(sh)ҵĹ֮Ȟ顡1/61/8=43

ɴ˿֪ױҶɿġ4-3/4+3=1/7

@С24÷1/7=168((g))

2)һ(g)ˮײbһ(g)_(ki)ˮϲbɂ(g)ͬӴּM(jn)ˮ_(ki)4(g)M(jn)ˮܕr(sh)Ҫ5Сr(sh)עM(mn)ˮ;_(ki)2(g)M(jn)ˮܕr(sh)Ҫ15Сr(sh)עM(mn)ˮ;FҪ2Сr(sh)ˮעM(mn)Ҫ_(ki)ق(g)M(jn)ˮ?

}˼·

ע()ˮ(wn)}һ(li)Ĺ̆(wn)}ˮעˮˮˮஔһ헹ˮǹλr(sh)gˮǹЧ

Ҫ2Сr(sh)ȌˮעM(mn)Ҫʹ2Сr(sh)ȵM(jn)ˮcˮ֮һˮҪ֪M(jn)ˮˮܵĹЧʼ(һˮ)ֻҪOijһ(g)λ1ɂ(g)ɗlƳ

҂Oÿ(g)ͬӵM(jn)ˮÿСr(sh)עˮ1t4(g)M(jn)ˮ5Сr(sh)עˮ(1×4×5)2(g)M(jn)ˮ15Сr(sh)עˮ(1×2×15)Ķ֪

ÿСr(sh)ˮ顡(1×2×15-1×4×5)÷(15-5)=1

һ(g)ˮcÿ(g)M(jn)ˮܵĹЧͬɴ˿֪һˮĿ顡1×4×5-1×5=152Сr(sh)ÿ(g)M(jn)ˮܵעˮ顡1×22Сr(sh)עM(mn)һˮ

Ҫق(g)M(jn)ˮ?(15+1×2)÷(1×2)=8.5≈9((g))

De

СДW(xu)DeҪ֞ɴ(li)

һҎtDeƽDκwD;

ҎtDe(yc(din));

ΣS=ah÷2 ;ƽ߅:S=ah

ΣS=a2 ;L(chng)ΣS=ab

:S=(a+b)h÷2 ;AΣS=πr2

ϵĹʽڌ(sh)H\Õr(sh)҂Ҫ˼

κƽ߅εȵ׵ȸôeʲôP(gun)ϵ?

Sƽ߅= 2S

κƽ߅εĵ׺eĸʲôP(gun)ϵ?

h=2hƽ߅

wDe

wS=6a2;L(chng)w:S=2(ab+bc+ac)

A:S=2πr2+πdh

һ(g)ɗlc߅ƽеľ(xin)Όεăɗl߅ȷֳ(Ҋ(jin)ˆD)DӰֵeռ(g)DeĎ׷֮

@(g)αֳ(g)ͬIJ׺͸Ҳ֪ҲֱӿYӲӰռ(g)DεĎ׷֮?

MψDλҎtDӋeҪ׃(dng)Dελû򌦈DM(jn)ƴaʹ׃ɿӋeҎtD

ҿYһ”W(xu)DeĿc(din)W(xu)

1.ҎtDe(ƽDwD)ӛסʽ

2.ҎtDεĕr(sh)\ƴaҎtDDQҎtD

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