[讨论]C答案，

cchxiao

<p class="MsoNormal" style="MARGIN: 0cm 1.25pt 0pt 0cm; mso-para-margin-right: .12gd; tab-stops: 54.0pt 108.0pt 162.0pt 216.0pt 270.0pt 324.0pt 378.0pt;"><b><span style="COLOR: red; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">二、可口可乐罐头为什么是这种样子</span></b><b><span lang="EN-US" style="COLOR: red; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">?<p></p></font></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 10.55pt; LINE-HEIGHT: 15.75pt; mso-char-indent-count: 1.0; mso-layout-grid-align: none;"><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">在讲述最优化</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">(</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">导数的应用</span></b><b><span style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">
                                        <span lang="EN-US">– </span></font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">极值问题</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">)</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">的前一堂课结束前</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">5~10</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">分钟，先提出问题：可口可乐、雪碧、健力宝等销量极大的饮料罐</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">(</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">易拉罐</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">)</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">顶盖的直径和从顶盖到底部的高之比为多少</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">? </font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">为什么</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">? </font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">它们的形状为什么是这样的</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">? <p></p></font></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 10.55pt; LINE-HEIGHT: 15.75pt; mso-char-indent-count: 1.0; mso-layout-grid-align: none;"><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">也可以要求同学在下一堂课前做</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">(</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">或预习</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">)</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">传统的微积分教材中的一道例题，例如“面向二十一世纪课程教材”中由王绵森、马知恩主编的《工科数学分析基础》</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">(</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">上册</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">)</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">，高等教育出版社，</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">1998</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">，</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">pp. 154-155 </font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">的例</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman"> 6.7 </font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">“用铁皮做成一个容积一定的圆柱形的无盖</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">(</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">或有盖</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">)</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">容器，问应当如何设计，才能使用料最省，这时圆柱的直径和高之比为多少</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">? </font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">”</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">(</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">我们略有修改</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">)</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">或者《托马斯微积分第</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">10</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">版》，高等教育出版社，</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">2003</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">，例</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">2(pp.291-293). </font></span></b><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">实际上</span></b><b><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">, </font></span></b><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">用几何语言来表述就是</span></b><b><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">: </font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">体积给定的圆柱体</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">, </font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">其表面积最小的尺寸</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman"> (</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">半径和高</span></b><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">)</font></span></b><b><span style="COLOR: blue; FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">为多少</span></b><font face="Times New Roman"><b><span lang="EN-US" style="COLOR: blue; mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;">?</span></b><b><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;">
                                        <p></p></span></b></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 15.75pt; mso-layout-grid-align: none;"><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">表面积用</span></b><b><span style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">
                                        <i><span lang="EN-US">S </span></i></font></span></b><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">表示</span></b><b><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">, </font></span></b><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">体积用</span></b><b><span style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">
                                        <i><span lang="EN-US">V </span></i></font></span></b><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">表示</span></b><b><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><font face="Times New Roman">, </font></span></b><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">则有</span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; LINE-HEIGHT: 15.75pt; mso-layout-grid-align: none;"><b><span style="FONT-FAMILY: 黑体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;;">想继续知道的给我D题答案！</span></b><b><span lang="EN-US" style="mso-bidi-font-size: 10.5pt; mso-fareast-font-family: 黑体;"><p></p></span></b></p>

孔夫子

这些东西太简单，连中学生都知道[em05][em05]

飘摇流星月

<p>想知道D题目的答案跟我联系啊，我用监控软件从别人电脑里搞过来的，想要的跟我联系QQ：397475238</p>

3450909

<p>垃圾</p><p>呵呵</p><p></p>