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μ㣬߳Ϊ1 Լ 500 ף1 Լ ף 5000 ǧסôԼΪ 2500 ƽǧס
Բμ㣬뾶ΪԲʽ S = r2 S ʾ ȡ 3.14r ʾ뾶ԼΪ 7850 ƽǧס
ǰĵ½Լ 960 ƽǧס
7850 ƽǧĻԼ½ 8.18
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˱⻰ʵЩԺһۺȻûоȷҲ﷽Բ
ǰ﷽Բ
аզ࣬ʽڼټ㡣
μ㣬߳Ϊ1 Լ 500 ף1 Լ ף 5000 ǧסôԼΪ 2500 ƽǧס
Բμ㣬뾶ΪԲʽ S = r2 S ʾ ȡ 3.14r ʾ뾶ԼΪ 7850 ƽǧס
ǰĵ½Լ 960 ƽǧס
7850 ƽǧĻԼ½ 8.18
˸İͼż˿ڣ
̫˷ԴˣֻҪܿٳɷֵũԺӾȥɡ
ʣСѣ˶٣ںη
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