{"id":104891,"date":"2026-06-15T17:55:45","date_gmt":"2026-06-15T09:55:45","guid":{"rendered":"https:\/\/www.dongwubaike.cn\/fanhao\/?p=104891"},"modified":"2026-06-15T17:55:45","modified_gmt":"2026-06-15T09:55:45","slug":"%e5%bc%a7%e9%95%bf%e5%92%8c%e6%89%87%e5%bd%a2%e9%9d%a2%e7%a7%af%e5%8c%97%e5%b8%88%e5%a4%a7%e7%89%88%e6%95%b0%e5%ad%a6%e5%88%9d%e4%b8%89%e4%b8%8a%e5%86%8c%e6%95%99%e6%a1%88","status":"publish","type":"post","link":"https:\/\/www.dongwubaike.cn\/fanhao\/104891.html","title":{"rendered":"\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef\u5317\u5e08\u5927\u7248\u6570\u5b66\u521d\u4e09\u4e0a\u518c\u6559\u6848"},"content":{"rendered":"<p style=\"text-indent: 2em; text-align: left;\">\u5f27\u957f=(n_\u03c0_r)\/180\u3002\u9762\u79ef=(n_\u03c0_r^2)\/360=l_r\/2\u3002\u4e00\u6761\u5706\u5f27\u548c\u7ecf\u8fc7\u8fd9\u6761\u5706\u5f27\u4e24\u7aef\u7684\u4e24\u6761\u534a\u5f84\u6240\u56f4\u6210\u7684\u56fe\u5f62\u53eb\u6247\u5f62\u3002\u663e\u7136\uff0c\u5b83\u662f\u7531\u5706\u5468\u7684\u4e00\u90e8\u5206\u4e0e\u5b83\u6240\u5bf9\u5e94\u7684\u5706\u5fc3\u89d2\u56f4\u6210\u3002\u4ee5\u4e0b\u662f\u5c0f\u7f16\u6574\u7406\u7684\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef\u5317\u5e08\u5927\u7248\u6570\u5b66\u521d\u4e09\u4e0a\u518c\u6559\u6848 \uff0c\u6b22\u8fce\u5927\u5bb6\u501f\u9274\u4e0e\u53c2\u8003!<\/p>\n<p style=\"text-indent: 2em; text-align: left;\"><strong>24.4\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef\uff1a\u6559\u6848<\/strong><\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u6559\u5b66\u5185\u5bb9<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">24.4\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef(2).<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u6559\u5b66\u76ee\u6807<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">1.\u4e86\u89e3\u6bcd\u7ebf\u7684\u6982\u5ff5.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">2.\u638c\u63e1\u5706\u9525\u7684\u4fa7\u9762\u79ef\u8ba1\u7b97\u516c\u5f0f\uff0c\u5e76\u4f1a\u5e94\u7528\u516c\u5f0f\u89e3\u51b3\u95ee\u9898.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">3.\u7ecf\u5386\u63a2\u7d22\u5706\u9525\u4fa7\u9762\u79ef\u8ba1\u7b97\u516c\u5f0f\u7684\u8fc7\u7a0b\uff0c\u53d1\u5c55\u5b66\u751f\u7684\u5b9e\u8df5\u63a2\u7d22\u80fd\u529b.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u6559\u5b66\u91cd\u70b9<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">1.\u7ecf\u5386\u63a2\u7d22\u5706\u9525\u4fa7\u9762\u79ef\u8ba1\u7b97\u516c\u5f0f\u7684\u8fc7\u7a0b.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">2.\u4e86\u89e3\u5706\u9525\u7684\u4fa7\u9762\u79ef\u8ba1\u7b97\u516c\u5f0f\uff0c\u5e76\u4f1a\u5e94\u7528\u516c\u5f0f\u89e3\u51b3\u95ee\u9898.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u6559\u5b66\u96be\u70b9<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u5706\u9525\u4fa7\u9762\u79ef\u8ba1\u7b97\u516c\u5f0f\u7684\u63a8\u5bfc\u8fc7\u7a0b.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u6559\u5b66\u8fc7\u7a0b<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u4e00\u3001\u5bfc\u5165\u65b0\u8bfe<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u51fa\u793a\u6f0f\u6597\u3001\u8499\u53e4\u5305\u7684\u56fe\u7247\uff0c\u8ba9\u5b66\u751f\u521d\u6b65\u8ba4\u8bc6\u5706\u9525\u5f62\u56fe\u5f62\uff0c\u5bfc\u5165\u65b0\u8bfe\u7684\u6559\u5b66.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u4e8c\u3001\u65b0\u8bfe\u6559\u5b66<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">1.\u63a2\u7d22\u5706\u9525\u7684\u4fa7\u9762\u516c\u5f0f.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u5706\u9525\u662f\u7531\u4e00\u4e2a\u5e95\u9762\u548c\u4e00\u4e2a\u4fa7\u9762\u56f4\u6210\u7684\u51e0\u4f55\u4f53\uff0c\u6211\u4eec\u628a\u8fde\u63a5\u5706\u9525\u9876\u70b9\u548c\u5e95\u9762\u5706\u5468\u4e0a\u4efb\u610f\u4e00\u70b9\u7684\u7ebf\u6bb5\u53eb\u505a\u5706\u9525\u7684\u6bcd\u7ebf.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u601d\u8003\uff1a\u5706\u9525\u7684\u4fa7\u9762\u5c55\u5f00\u56fe\u662f\u4ec0\u4e48\u56fe\u5f62?\u5982\u4f55\u8ba1\u7b97\u5706\u9525\u7684\u4fa7\u9762\u79ef?\u5982\u4f55\u8ba1\u7b97\u5706\u9525\u7684\u5168\u9762\u79ef?<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">(1)\u5982\u56fe\uff0c\u6cbf\u4e00\u6761\u6bcd\u7ebf\u5c06\u5706\u9525\u4fa7\u9762\u526a\u5f00\u5e76\u5c55\u5e73\uff0c\u5bb9\u6613\u5f97\u5230\uff0c\u5706\u9525\u7684\u4fa7\u9762\u5c55\u5f00\u56fe\u662f\u4e00\u4e2a\u6247\u5f62.<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">(2)\u8bbe\u5706\u9525\u7684\u6bcd\u7ebf\u957f\u4e3al\uff0c\u5e95\u9762\u5706\u7684\u534a\u5f84\u4e3ar\uff0c\u90a3\u4e48\u8fd9\u4e2a\u6247\u5f62\u7684\u534a\u5f84\u4e3al\uff0c\u6247\u5f62\u7684\u5f27\u957f\u4e3a2\u03c0r\uff0c\u56e0\u6b64\u5706\u9525\u7684\u4fa7\u9762\u79ef\u4e3a\u03c0rl\uff0c\u5706\u9525\u7684\u5168\u9762\u79ef\u4e3a\u03c0r(r+l).<\/p>\n<p style=\"text-indent: 2em; text-align: left;\"><strong>24.4\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef\u540c\u6b65\u7ec3\u4e60<\/strong><\/p>\n<p style=\"text-indent: 2em; text-align: left;\">1.\u82e5\u8981\u7528\u4e00\u4e2a\u5e95\u9762\u76f4\u5f84\u4e3a10\uff0c\u9ad8\u4e3a12\u7684<a href=\"https:\/\/www.dongwubaike.cn\/fanhao\/tag\/shi-xin-yuan\" title=\"View all posts in \u5b9e\u5fc3\u5706\" target=\"_blank\">\u5b9e\u5fc3\u5706<\/a>\u67f1\u4f53\uff0c\u5236\u4f5c\u4e00\u4e2a\u5e95\u9762\u548c\u9ad8\u5206\u522b\u4e0e\u5706\u67f1\u5e95\u9762\u534a\u5f84\u548c\u9ad8\u76f8\u540c\u7684\u5706\u9525\uff0c\u5219\u8be5\u5706\u9525\u7684\u4fa7\u9762\u79ef\u4e3a(\u3000\u3000)<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">A.60\u03c0 B.65\u03c0 C.78\u03c0 D.120\u03c0<\/p>\n<p style=\"text-indent: 2em; text-align: left;\"><strong>24.4\u300a\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef\u300b\u540c\u6b65\u68c0\u6d4b\u9898<\/strong><\/p>\n<p style=\"text-indent: 2em; text-align: left;\">1.\u4e00\u4e2a\u76f4\u89d2\u4e09\u89d2\u5f62\u7eb8\u677f\uff0c\u5176\u4e24\u6761\u76f4\u89d2\u8fb9\u957f\u5206\u522b\u4e3a6 cm\u548c8 cm\uff0c\u5c0f\u660e\u4ee5\u7eb8\u677f\u7684\u659c\u8fb9\u4e3a\u65cb\u8f6c\u8f74\u65cb\u8f6c\u8fd9\u4e2a\u4e09\u89d2\u5f62\u7eb8\u677f\u5f62\u6210\u5982\u56fe11\u6240\u793a\u7684\u65cb\u8f6c\u4f53.\u8bf7\u4f60\u5e2e\u5c0f\u660e\u63a8\u7b97\u51fa\u8fd9\u4e2a\u65cb\u8f6c\u4f53\u7684\u5168\u9762\u79ef.(\u03c0\u53d63.14)<\/p>\n<p style=\"text-indent: 2em; text-align: left;\"><strong style=\"color:#125b86\"><em style=\"display:none\"><\/em>\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef\u5317\u5e08\u5927\u7248\u6570\u5b66\u521d\u4e09\u4e0a\u518c\u6559\u6848 \u76f8\u5173\u6587\u7ae0\uff1a<\/strong><\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 2021\u6700\u65b0\u5317\u5e08\u5927\u7248\u4e5d\u5e74\u7ea7\u6570\u5b66\u4e0a\u518c\u6559\u6848<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u5317\u5e08\u5927\u7248\u5c0f\u5b66\u4e09\u5e74\u7ea7\u6570\u5b66\u4e0a\u518c\u6559\u6848\u6700\u65b0\u6587\u6848<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u4e09\u5e74\u7ea7\u6570\u5b66\u4e0a\u518c\u6559\u6848\u5317\u5e08\u5927\u7248\u6700\u65b0\u6587\u6848<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u5317\u5e08\u5927\u7248\u4e00\u5e74\u7ea7\u6570\u5b66\u4e0a\u518c<a href=\"https:\/\/www.dongwubaike.cn\/fanhao\/tag\/bei-ke-jiao-an\" title=\"View all posts in \u5907\u8bfe\u6559\u6848\" target=\"_blank\">\u5907\u8bfe\u6559\u6848<\/a>\u6a21\u677f5\u7bc7<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u5c0f\u5b66\u4e09\u5e74\u7ea7\u6570\u5b66\u4e0a\u518c\u6559\u6848\u5317\u5e08\u5927\u7248\u6700\u65b0\u6587\u6848<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u6700\u65b0\u4e03\u5e74\u7ea7\u4e0a\u518c\u6570\u5b66\u6559\u6848\u5317\u5e08\u5927\u7248\u8303\u6587<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u5317\u5e08\u5927\u7248\u4e03\u5e74\u7ea7\u6570\u5b66\u7b2c\u4e00\u7ae0\u6559\u6848\u6700\u65b0\u6587\u6848<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u65b0\u5317\u5e08\u5927\u7248\u4e09\u5e74\u7ea7\u6570\u5b66\u4e0a\u518c\u6559\u6848\u6700\u65b0\u8303\u6587<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 \u65b0\u5317\u5e08\u5927\u7248\u4e00\u5e74\u7ea7\u6570\u5b66\u4e0a\u518c\u6559\u6848\u6700\u65b0\u8303\u6587<\/p>\n<p style=\"text-indent: 2em; text-align: left;\">\u2605 2021\u7edf\u8ba1\u56fe\u7684\u9009\u62e9\u5317\u5e08\u5927\u7248\u6570\u5b66\u521d\u4e00\u4e0a\u518c\u6559\u6848<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f27\u957f=(n_\u03c0_r)\/180\u3002\u9762\u79ef=(n_\u03c0_r^2)\/360=l_r\/2\u3002\u4e00\u6761\u5706\u5f27\u548c\u7ecf\u8fc7\u8fd9\u6761\u5706\u5f27\u4e24\u7aef\u7684\u4e24\u6761\u534a\u5f84\u6240\u56f4\u6210\u7684\u56fe\u5f62\u53eb\u6247\u5f62\u3002\u663e\u7136\uff0c\u5b83\u662f\u7531\u5706\u5468\u7684\u4e00\u90e8\u5206\u4e0e\u5b83\u6240\u5bf9\u5e94\u7684\u5706\u5fc3\u89d2\u56f4\u6210\u3002\u4ee5\u4e0b\u662f\u5c0f\u7f16\u6574\u7406\u7684\u5f27\u957f\u548c\u6247\u5f62\u9762\u79ef\u5317\u5e08\u5927\u7248\u6570\u5b66\u521d\u4e09\u4e0a\u518c\u6559\u6848 \uff0c\u6b22 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[41883],"tags":[49497],"class_list":["post-104891","post","type-post","status-publish","format-standard","hentry","category-fanwen","tag-shi-xin-yuan"],"_links":{"self":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/posts\/104891","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/comments?post=104891"}],"version-history":[{"count":0,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/posts\/104891\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/media?parent=104891"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/categories?post=104891"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dongwubaike.cn\/fanhao\/wp-json\/wp\/v2\/tags?post=104891"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}