成考院校在线答案
- 2023-02-12 [单选] <p class="MsoNormal">19、<span style="font-family:宋体">土地的供给曲线是一条（</span><span lang="EN-US"> </span><span style="font-family:宋体">）。</span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">1、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">力对物体作用效果，可使物体（</span><span lang="EN-US"><span style="mso-spacerun:yes"> </span></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">）。</span></p>
- 2023-02-12 [单选] <p class="MsoNormal">2、<span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman"; mso-hansi-font-family:"Times New Roman"">边长为</span><i style="mso-bidi-font-style: normal"><span lang="EN-US">L</span></i><span style="font-family:Microsoft Yahei;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">的均质正方形平板，位于铅垂平面内并置于光滑水平面上，如图示，若给平板一微小扰动，使其从图示位置开始倾倒，平板在倾倒过程中，其质心</span><i style="mso-bidi-font-style:normal"><span lang="EN-US">C</span></i><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">点的运动轨迹是（</span><span lang="EN-US"><span style="mso-spacerun:yes"> </span></span><span style="font-family:Microsoft Yahei;mso-ascii-font-family:"Times New Roman";mso-hansi-font-family: "Times New Roman"">）。</span></p> <p class="MsoNormal"><span lang="EN-US"> <v:shape id="_x0000_i1051" type="#_x0000_t75" style="width:135pt;height:93.6pt" o:allowoverlap="f"> <v:imagedata src="LLLXDX.files/image022.png" o:title="二" croptop="14605f" cropbottom="7170f" cropleft="3747f" cropright="6206f"></v:imagedata> </v:shape></span></p>
- 2023-02-12 [单选] <p class="MsoNormal">3、 <span style="font-family:Microsoft Yahei;">结构及其受力如图</span><span>4</span><span style="font-family:Microsoft Yahei;">所示，已知均布载荷集度</span><i><span>q</span></i><span>=10N/m</span><span style="font-family:Microsoft Yahei;">，力偶矩的大小</span><span>M=5N</span><span style="font-family:Microsoft Yahei;">·</span><span>m</span><span style="font-family:Microsoft Yahei;">，</span><span>a=1m</span><span style="font-family:Microsoft Yahei;">，不计结构自重。则</span><span>CD</span><span style="font-family:Microsoft Yahei;">杆上</span><span>C</span><span style="font-family:Microsoft Yahei;">端所受的约束力的大小为</span><i><span>F</span></i><span>= </span><span style="font-family:Microsoft Yahei;">（</span><span><span> </span></span><span style="font-family:Microsoft Yahei;">）</span><span>N</span><span style="font-family:Microsoft Yahei;">。<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205091821_266.png"></span></p><p class="MsoNormal"> <span style="font-size:12pt;"> </span> </p>
- 2023-02-12 [单选] <p class="MsoNormal">16、<span style="font-family:宋体">重为</span><b><i><span lang="EN-US">P</span></i></b><span style="font-family:宋体">的均质圆柱放在</span><span lang="EN-US">V</span><span style="font-family:宋体">形槽里，考虑摩擦。当圆柱上作用有一力偶，其矩为</span><i><span lang="EN-US">M</span></i><span style="font-family:宋体">时</span><span lang="EN-US">(</span><span style="font-family:宋体">见下图</span><span lang="EN-US">)</span><span style="font-family:宋体">，圆柱处于极限平衡状态。此时接触点</span><i><span lang="EN-US">A</span></i><i><span style="font-family:宋体">、</span><span lang="EN-US">B</span></i><span style="font-family:宋体">处的法向约束力</span><i><span lang="EN-US">F</span></i><sub><span lang="EN-US">N<i>A</i></span></sub><span style="font-family:宋体">与</span><i><span lang="EN-US">F</span></i><sub><span lang="EN-US">N<i>B</i></span></sub><span style="font-family:宋体">的关系为</span><span lang="EN-US">( )</span><span style="font-family:宋体">。</span></p> <p class="MsoNormal"><span lang="EN-US"><img width="155" height="92" id="图片 12" src="http://wljy.whut.edu.cn//uploadfiles/word/lllx001.files/image008.jpg"></span></p>
- 2023-02-12 [单选] <p class="MsoNormal">5、 <span style="font-family:Microsoft Yahei;">图示四个力四边形中，表示力矢</span><span>R</span><span style="font-family:Microsoft Yahei;">是</span><span>F<sub>1</sub></span><span style="font-family:Microsoft Yahei;">、</span><span>F<sub>2</sub></span><span style="font-family:Microsoft Yahei;">和</span><span>F<sub>3</sub></span><span style="font-family:Microsoft Yahei;">的合力图形是（</span><span><span> </span></span><span style="font-family:Microsoft Yahei;">）。</span><span> </span> </p>
- 2023-02-12 [单选] <p class="MsoNormal">21、 <span style="font-family:Microsoft Yahei;">一重</span>W的物体置于倾角为 <img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205091804_254.png">的斜面上，若摩擦因数为f，且tg<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205092856_149.png"><f，则物体（ ）。<img alt="" src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191205/20191205092509_388.png"></p><p class="MsoNormal"> <span> </span> </p>
- 2023-02-12 [单选] <p class="MsoNormal">7、 在图示机构中，杆O 1 A <img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191120/20191120090928_369.png" alt=""> O2 B，杆O 2 C <img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191120/20191120090938_337.png" alt=""> O3 D，且O 1 A =200mm，O 2 C =400mm，CM = MD =300mm，若杆AO1 以角速度 <img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191120/20191120090949_577.png" alt=""> = 3 rad / s 匀速转动，则D点的速度的大小为 cm/s。<img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191120/20191120092906_550.png" alt=""></p><p class="MsoNormal"> <span> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">18、<span style="font-family:宋体">边长为</span><i><span lang="EN-US">L</span></i><span style="font-family:宋体">的均质正方形平板，位于竖直平面内并置于光滑水平面上，如下图所示。若给平板一微小扰动，使其从图示位置开始倾倒，则平板在倾倒过程中，其质心点</span><i><span lang="EN-US">C</span></i><span style="font-family:宋体">的运动轨迹是</span><span lang="EN-US">( )</span><span style="font-family:宋体">。</span></p> <p class="0"><span lang="EN-US"><img width="130" height="88" id="图片 13" src="http://wljy.whut.edu.cn//uploadfiles/word/lllx001.files/image009.jpg"></span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:12.0pt"> </span></p>
- 2023-02-12 [单选] <p class="MsoNormal">36、 <span> </span></p><p class="MsoNormal"> <span><span> </span>[</span><span style="font-family:Microsoft Yahei;">题干</span><span>] </span><span style="font-family:Microsoft Yahei;">系统如图，</span><i><span>AB</span></i><span style="font-family:Microsoft Yahei;">杆上作用矩为</span><span>M</span><span style="font-family:Microsoft Yahei;">的力偶，设</span><i><span>AC=2R</span></i><span style="font-family:Microsoft Yahei;">，</span><i><span>R</span></i><span style="font-family:Microsoft Yahei;">为轮</span><i><span>C</span></i><span style="font-family:Microsoft Yahei;">的半径，各物体的重量及摩擦不计。求绳子的拉力。<img src="http://wljy.whut.edu.cn:80/uploadfiles/kindeditorAttached/image/20191120/20191120103337_320.png" alt=""></span></p><p class="MsoNormal"> <span> </span></p>