}ĿijУƼ(sh)`F(tun)(sh)`O(sh)СIJ^(gu)
СȡώṩĈAμ(x)Fh(hun)ҵAOҳAOһlֱ(bio)ӛABD1y(c)AB8
ڌAh(hun)M(jn)зʹc(din)BڈAOλ۲ֵĈAh(hun)δ۵ĈAh(hun)a(chn)c(din)քe(bio)ӛCDD2
һ(x)zBCDc(din)D3
Ӌ(j)zCDL(zhng)ȣ
СӋ(j)zCDL(zhng)Ȟ飨
A. 4B. 2
C. 2
D. 3
ĿД(sh)W(xu) (li)Դ }ͣ
}Ŀ±ӛһTPͶ@ĽY(ji)@ôTͶ@һͶеĸʼs( )
Ͷ@Δ(sh) | 10 | 50 | 100 | 150 | 200 | 250 | 300 | 500 |
ͶдΔ(sh) | 4 | 35 | 60 | 78 | 104 | 123 | 152 | 251 |
Ͷl | 0.40 | 0.70 | 0.60 | 0.52 | 0.52 | 0.49 | 0.51 | 0.50 |
A. 0.7B. 0.6C. 0.5D. 0.4
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ĿД(sh)W(xu) (li)Դ }ͣ
}ĿijЌ(sh)ʩa(chn)I(y)(zhn)ؚؚ(h)аɽNֲijƷN֣֪ԓֵijɱr(ji)6Ԫ/ǧի@(ji)ͶЈ(chng)N(xio)ەr(sh){(dio)Ј(chng)l(f)F(xin)ԓֲ(hu)̝ÿN(xio)yǧˣcN(xio)ۆr(ji)xԪ֮gĺ(sh)P(gun)ϵDʾ
1ycxĺ(sh)P(gun)ϵʽ(xi)xȡֵ
2(dng)ԓƷNֶr(ji)ٕr(sh)ÿN(xio)۫@õ(rn)(rn)Ƕ
3ijr(nng)(h)깲ժ12000ǧˣԓƷNֵı|(zh)ڞ50գ2N(xio)۷ʽܷڱ|(zh)ڃ(ni)ȫN(xio)@Ո(qng)f(shu)ܣ(yng)N(xio)ۃr(ji)Ԫr(sh)N(xio)ܫ@(rn)
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ĿД(sh)W(xu) (li)Դ }ͣ
}Ŀڔ(sh)W(xu)dȤСM(dng)УСM(jn)Д(sh)W(xu)̽(dng)߅L(zhng)2ABCDc߅L(zhng)2AEFGD1λ÷ADcAEͬһֱABcAGͬһֱϣ
1Сl(f)F(xin)DGBEՈ(qng)f(shu)ɣ
2D2СABCD@c(din)Ar(sh)D(zhun)(dng)c(din)BǡھDGϕr(sh)Ո(qng)˕r(sh)BEL(zhng)
3D3СABCD@c(din)A^m(x)r(sh)D(zhun)DGcBEཻc(din)H(xi)GHEcBHDe֮͵ֵ(jin)Ҫf(shu)ɣ
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ĿД(sh)W(xu) (li)Դ }ͣ
}ĿСƽQ110I(xin)YV(du)нO(sh)M(jn)D֪бABL(zhng)60½(BAC)45㣬BCACF(xin)Ӌ(j)бc(din)D̎ȥб£һ(g)ƽˮƽCAeƽ_(ti)DEһlµбBE(ɂ(g)С}Y(ji)̖(ho))
(1)бBE±Ȟ1eƽ_(ti)DEL(zhng)Ƕ
(2)һGHxAc(din)33h(yun)(AG33)СDc(din)y(c)ý픲H(HDM)30㣮c(din)BCAGHͬһ(g)ƽ(ni)c(din)CAGͬһlֱϣHGCG(wn)GHߞף
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ĿД(sh)W(xu) (li)Դ }ͣ
}Ŀ҅^(q)ijЌW(xu)_(ki)չ(hu)xăr(ji)ֵ^vِ(dng)ţ1ţ2(j)ِɿ(j)x5xօӏ(f)ِɂ(g)x5xֵď(f)ِɿ(j)M(mn)֞100֣Dʾ(j)DД(sh)(j)QІ(wn)}
1ţ1(f)ِɿ(j)λ(sh) ֣ţ2(f)ِɿ(j)ı(sh)
2СͬW(xu)ѽ(jng)˾ţ1(f)ِƽɿ(j) =85֣S2=
[85852+75852+80852+85852+100852]=702Ո(qng)ţ2(f)ِƽɿ(j)x2ͷS22
3(j)2Ӌ(j)Y(ji)Ă(g)༉(j)ď(f)ِɿ(j)^
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ĿД(sh)W(xu) (li)Դ }ͣ
}ĿDL(zhng)ɳ}(cng)(gu)HBC_(d)452mĿǰʡһߘ̎ͬһˮƽϵĵڶߘDE340m˜y(c)ߘBCϰl(f)ABĸ߶ژDEDc(din)y(c)AǞ픶Ec(din)y(c)AǡAEF=45
1O(sh)ABxףՈ(qng)úxĴ(sh)ʽʾAFL(zhng)
2l(f)ABĸ߶ȣcossin
tan
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ĿД(sh)W(xu) (li)Դ }ͣ
}ĿD֪タ(jng)^(gu)c(din)
タĺ(sh)_(d)ʽ
タc(din)(bio)
D1c(din)Dǒタһ(dng)c(din)^(gu)DySƽоDEֱABc(din)E(dng)
r(sh)Ո(qng)ֱӌ(xi)Dc(din)ęM(bio)
D2(dng)DֱABϷタһ(dng)c(din)r(sh)
FO(sh)ACc(din)MBBDBMǷc(din)Dʹ
һ(g)c
Ո(qng)ֱӌ(xi)c(din)DęM(bio)Ո(qng)f(shu)ɣ
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