{"id":1577,"date":"2018-06-28T08:59:45","date_gmt":"2018-06-28T00:59:45","guid":{"rendered":"http:\/\/www.xuehelp.cn\/?p=1577"},"modified":"2018-06-28T08:59:45","modified_gmt":"2018-06-28T00:59:45","slug":"%e5%b0%8f%e6%95%8f%e4%bb%8ea%e5%9c%b0%e5%87%ba%e5%8f%91%e5%90%91b%e5%9c%b0%e8%a1%8c%e8%b5%b0","status":"publish","type":"post","link":"http:\/\/www.xuehelp.cn\/index.php\/archives\/1577","title":{"rendered":"\u5c0f\u654f\u4eceA\u5730\u51fa\u53d1\u5411B\u5730\u884c\u8d70"},"content":{"rendered":"<p>\u5c0f\u654f\u4eceA\u5730\u51fa\u53d1\u5411B\u5730\u884c\u8d70\uff0c\u540c\u65f6\u5c0f\u806a\u4eceB\u5730\u51fa\u53d1\u5411A\u5730\u884c\u8d70\uff0c\u5982\u56fe\u6240\u793a\uff0c\u76f8\u4ea4\u4e8e\u70b9P\u7684\u4e24\u6761\u7ebf\u6bb5l<sub>1<\/sub>\u3001l<sub>2<\/sub>\u5206\u522b\u8868\u793a\u5c0f\u654f\u3001\u5c0f\u806a\u79bbB\u5730\u7684\u8ddd\u79bby\uff08km\uff09\u4e0e\u5df2\u7528\u65f6\u95f4x\uff08h\uff09\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u5219\u5c0f\u654f\u3001\u5c0f\u806a\u884c\u8d70\u7684\u901f\u5ea6\u5206\u522b\u662f\uff08\u3000\u3000\uff09<a href=\"http:\/\/www.xuehelp.cn\/wp-content\/uploads\/2018\/06\/d043ad4bd11373f0c29ff12ea70f4bfbfaed04da.png\" rel=\"attachment wp-att-1578\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-1578\" src=\"http:\/\/www.xuehelp.cn\/wp-content\/uploads\/2018\/06\/d043ad4bd11373f0c29ff12ea70f4bfbfaed04da.png\" alt=\"d043ad4bd11373f0c29ff12ea70f4bfbfaed04da\" width=\"199\" height=\"197\" \/><\/a><\/p>\n<p><span class=\"qb-content\" data-gradeid=\"0\" data-courseid=\"2\">A. 3km\/h\u548c4km\/h<br \/>\nB. 3km\/h\u548c3km\/h<br \/>\nC. 4km\/h\u548c4km\/h<br \/>\nD. 4km\/h\u548c3km\/h<\/span><\/p>\n<p><!--more--><\/p>\n<p>\u8bbe\u5c0f\u654f\u7684\u901f\u5ea6\u4e3a\uff1am\uff0c\u5219\u51fd\u6570\u5f0f\u4e3a\uff0cy=mx+b\uff0c<br \/>\n\u7531\u5df2\u77e5\u5c0f\u654f\u7ecf\u8fc7\u4e24\u70b9\uff081.6\uff0c4.8\uff09\u548c\uff082.8\uff0c0\uff09\uff0c<br \/>\n\u6240\u4ee5\u5f97\uff1a4.8=1.6m+b\uff0c0=2.8m+b\uff0c<br \/>\n\u89e3\u5f97\uff1am=-4\uff0cb=11.2\uff0c<br \/>\n\u5c0f\u654f\u79bbB\u5730\u7684\u8ddd\u79bby\uff08km\uff09\u4e0e\u5df2\u7528\u65f6\u95f4x\uff08h\uff09\u4e4b\u95f4\u7684\u5173\u7cfb\u4e3a\uff1ay=-4x+11.2\uff1b<br \/>\n\u7531\u5b9e\u9645\u95ee\u9898\u5f97\u5c0f\u654f\u7684\u901f\u5ea6\u4e3a4km\/h\uff0e<br \/>\n\u8bbe\u5c0f\u806a\u7684\u901f\u5ea6\u4e3a\uff1an\uff0c\u5219\u51fd\u6570\u56fe\u8c61\u8fc7\u539f\u70b9\u5219\u51fd\u6570\u5f0f\u4e3a\uff0cy=nx\uff0c<br \/>\n\u7531\u5df2\u77e5\u7ecf\u8fc7\u70b9\uff081.6\uff0c4.8\uff09\uff0c<br \/>\n\u6240\u4ee5\u5f97\uff1a4.8=1.6n\uff0c<br \/>\n\u5219n=3\uff0c<br \/>\n\u5373\u5c0f\u806a\u7684\u901f\u5ea6\u4e3a3km\/h\uff0e<br \/>\n\u6545\u9009D\uff0e<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5c0f\u654f\u4eceA\u5730\u51fa\u53d1\u5411B\u5730\u884c\u8d70\uff0c\u540c\u65f6\u5c0f\u806a\u4eceB\u5730\u51fa\u53d1\u5411A\u5730\u884c\u8d70\uff0c\u5982\u56fe\u6240\u793a\uff0c\u76f8\u4ea4\u4e8e\u70b9P\u7684\u4e24\u6761\u7ebf\u6bb5l1\u3001l2\u5206\u522b\u8868\u793a\u5c0f\u654f\u3001 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[537],"_links":{"self":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts\/1577"}],"collection":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1577"}],"version-history":[{"count":1,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts\/1577\/revisions"}],"predecessor-version":[{"id":1579,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts\/1577\/revisions\/1579"}],"wp:attachment":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1577"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1577"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1577"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}