{"id":4882,"date":"2025-12-13T09:15:16","date_gmt":"2025-12-13T01:15:16","guid":{"rendered":"http:\/\/jhwk.online\/?p=4882"},"modified":"2025-12-13T09:16:57","modified_gmt":"2025-12-13T01:16:57","slug":"%e4%b8%89%e8%a7%92%e5%87%bd%e6%95%b0%e9%a2%984-2-2-3","status":"publish","type":"post","link":"http:\/\/jhwk.online\/?p=4882","title":{"rendered":"\u7acb\u4f53\u51e0\u4f55\u98983"},"content":{"rendered":"\n<div class=\"wp-block-stackable-subtitle stk-block-subtitle stk-block stk-8afe3d6\" data-block-id=\"8afe3d6\"><style>.stk-8afe3d6 .stk-block-subtitle__text{color:#0693e3 !important;}<\/style><p class=\"stk-block-subtitle__text stk-subtitle has-text-color\">\u672c\u9898\u75312023\u7ea722\u73ed\u674e\u4fca\u68a6\u8bb2\u89e3\uff01<\/p><\/div>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"608\" style=\"aspect-ratio: 1080 \/ 608;\" width=\"1080\" controls src=\"http:\/\/jhwk.online\/wp-content\/uploads\/2025\/12\/\u7acb\u4f53\u51e0\u4f553.mp4\"><\/video><\/figure>\n\n\n\n<p>[ratemypost]<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-vivid-cyan-blue-color has-alpha-channel-opacity has-vivid-cyan-blue-background-color has-background is-style-wide\"\/>\n\n\n\n<h5 class=\"wp-block-heading has-vivid-cyan-blue-color has-text-color has-link-color wp-elements-8a052dbd5caa870510f1e594e9e095cf\">\u9898\u76ee\u5c55\u793a\u2014\u2014\u5148\u63a2\u7a76\u3001\u518d\u542c\u8bb2<\/h5>\n\n\n\n\u5982\u56fe,\u70b9$P$\u4e3a\u6b63\u65b9\u5f62$ABCD$\u6240\u5728\u5e73\u9762\u5916\u4e00\u70b9,$M$\u4e3a$PA$\u4e2d\u70b9,$\\overrightarrow{DE}=\u03bb\\overrightarrow{DP}(0<\u03bb<1),$\u5e73\u9762$ABCD$\u22a5\u5e73\u9762$ABP$,$AB=BP=2,AB\u22a5BP.$\n(1) \u5f53$\u03bb=\\displaystyle \\frac {2}{3}$\u65f6,\u6c42\u8bc1:$PD\u22a5$\u5e73\u9762$BEM$;\n(2) \u5f53\u4e8c\u9762\u89d2$D - BM - E$\u7684\u6b63\u5f26\u503c\u4e3a$\\displaystyle \\frac {\\sqrt {6}}{9}$\u65f6,\u6c42\u03bb\u7684\u503c.\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-28f84493 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\"><\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"447\" height=\"411\" src=\"http:\/\/jhwk.online\/wp-content\/uploads\/2025\/11\/tz\u7acb\u4f53\u51e0\u4f553.png\" alt=\"\" class=\"wp-image-4871\" style=\"width:178px;height:auto\" srcset=\"http:\/\/jhwk.online\/wp-content\/uploads\/2025\/11\/tz\u7acb\u4f53\u51e0\u4f553.png 447w, http:\/\/jhwk.online\/wp-content\/uploads\/2025\/11\/tz\u7acb\u4f53\u51e0\u4f553-300x276.png 300w\" sizes=\"auto, (max-width: 447px) 100vw, 447px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-vivid-cyan-blue-color has-alpha-channel-opacity has-vivid-cyan-blue-background-color has-background is-style-wide\"\/>\n\n\n\n<h4 class=\"wp-block-heading has-text-align-center has-text-color has-background has-link-color has-medium-font-size wp-elements-a9b50415254efbdf68622339fec32d65\" style=\"color:#1e4b69;background:linear-gradient(0deg,rgb(230,242,255) 0%,rgb(230,242,255) 16%,rgb(92,175,230) 100%)\">\u89e3\u9898\u63a2\u7a76\u2014\u2014\u70b9\u51fb\u76f4\u8fbe<\/h4>\n\n\n\n<style>\n  .video-jump-btn {\n    cursor: pointer;\n    text-align: left;\n    background-color: #e6f2ff; 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