}ĿijƼ`F`O(sh)䣬СIJ^
СȡώṩĈAμFh(hun)ҵAOҳAOһlֱ(bio)ӛABD1yAB8
ڌAh(hun)MзʹcBڈAOλã۲ֵĈAh(hun)δ۵ĈAh(hun)a(chn)cքe(bio)ӛCDD2
һzBCDcD3
ӋzCDLȣ
СӋzCDLȞ飨
A. 4B. 2
C. 2
D. 3
ĿД(sh)W(xu) Դ }ͣ
}Ŀ±ӛһTPͶ@ĽY(ji)@ôTͶ@һΣͶеĸʼs( )
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) Դ }ͣ
}ĿijЌʩa(chn)I(y)(zhn)ؚؚаɽNֲijƷN֣֪ԓֵijɱr6Ԫ/ǧի@(ji)ͶЈNەr{(dio)Јl(f)F(xin)ԓֲ̝ÿNyǧˣcNۆrxԪ֮gĺ(sh)P(gun)ϵDʾ
1ycxĺ(sh)P(gun)ϵʽxȡֵ
2(dng)ԓƷNֶrٕrÿN۫@õǶ٣
3ijr(nng)깲ժ12000ǧԓƷNֵı|(zh)ڞ50죬գ2N۷ʽܷڱ|(zh)ڃ(ni)ȫN@֣Ոf(yng)NۃrԪrNܫ@
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ĿД(sh)W(xu) Դ }ͣ
}Ŀڔ(sh)W(xu)dȤСMУСMД(sh)W(xu)̽߅L2ABCDc߅L2AEFGD1λ÷ãADcAEͬһֱABcAGͬһֱϣ
1Сl(f)F(xin)DGBEՈfɣ
2D2СABCD@cArD(zhun)(dng)cBǡھDGϕrՈ˕rBEL
3D3СABCD@cA^m(x)rD(zhun)DGcBEཻcHGHEcBHDe֮͵ֵҪfɣ
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ĿД(sh)W(xu) Դ }ͣ
}ĿСƽQ110IYVнO(sh)MD֪бABL60½(BAC)45BCACF(xin)ӋбcD̎ȥбһƽˮƽCAeƽ_DEһlµбBE(ɂС}Y(ji)̖)
(1)бBE±Ȟ1eƽ_DELǶ
(2)һGHxAc33h(AG33)СDcyý픲H(HDM)30㣮cBCAGHͬһƽ(ni)cCAGͬһlֱϣHGCGGHߞף
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ĿД(sh)W(xu) Դ }ͣ
}Ŀ҅^(q)ijЌW(xu)_չxărֵ^vِţ1ţ2(j)ِɿx5xօӏ(f)ِɂx5xֵď(f)ِɿM֞100֣Dʾ(j)DД(sh)(j)QІ}
1ţ1(f)ِɿλ(sh) ֣ţ2(f)ِɿı(sh)
2СͬW(xu)ѽ(jng)˾ţ1(f)ِƽɿ =85S2=
[85852+75852+80852+85852+100852]=702Ոţ2(f)ِƽɿx2ͷS22
3(j)2ӋY(ji)Ă༉ď(f)ِɿ^ã
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}ĿDLɳ}HBC_452mĿǰʡһߘ̎ͬһˮƽϵĵڶߘDE340m˜yߘBCϰl(f)ABĸ߶ژDEDcyAǞ픶EcyAǡAEF=45
1O(sh)ABxףՈúxĴ(sh)ʽʾAFL
2l(f)ABĸ߶ȣcossin
tan
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ĿД(sh)W(xu) Դ }ͣ
}ĿD֪タ(jng)^c
タĺ(sh)_ʽ
タc(bio)
D1cDǒタһc^DySƽоDEֱABcE(dng)
rՈֱӌDcęM(bio)
D2(dng)DֱABϷタһcr
FO(sh)ACcMBBDBMǷcDʹ
һc
ՈֱӌcDęM(bio)Ոfɣ
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