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(yng)zֱCʷ
(yng)zֱC=(rҪ֧ܶ-ȶɿܶ)÷(yng)zGƽ
[]ij˾A(y)2002(yng)zGƽ3000ԪҪ֧2100Ԫ(yng)zȶɿܶ600Ԫù˾2002(yng)zֱC2002ݏ?BR>A.70
B.20.75
C.50
D.28.57
SC

(yng)zֱC=(rҪ֧ܶ-ȶɿܶ)÷(yng)zGƽ=(2100-600)÷3000=50%
Ľڣ
һйس

ĸБKǾʱ;ܹʹܳɱ͵ijC(jng)?BR>һöĻģ
1.öģ͵ļ裺ÃeqΪǰ᣺
1I(y)һr(sh)ԑĽԽ(zhn)_A(y)?BR>2ĺ](mi)۱ȽϾ?BR>3ļ۸ȶҲۿPȫI(y)оÿr(sh)һһελ
4(zh)ƣ
5ȱΣ
6C(yng)㣬򲻜档
2.س
?×ÿ^=A/Q×B
?ƽ×λ=Q/2×C
3.Ѳļ㹫I?BR>پö(Q*)ʽ
՟ʽݱʽ
H(TC(Q*))ʽ
ÿӍ(N*)ʽ N*=/ö=A/Q*
Ӎ(t*)ʽt*=360/N*
öռʽ( I*)ʽ:I*=ƽ·=Q*/2·P
[8-4]ij˾Ҳ36000ǧˣòϲ񚢞200Ԫ/ǧˣs16Ԫ/ǧˣƽÿ^20Ԫ
Ҫ
1㱾Qľ?BR>:
㱾Qľ?BR>Ҳϵľý