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</gourl2><NodeID>24</NodeID><Title>分割法测物体的重心</Title><SoftSize>0.00</SoftSize><SoftSizeUnit>B</SoftSizeUnit><SoftSize>0.00</SoftSize><SoftSizeUnit>B</SoftSizeUnit><typeicon>other</typeicon><editor>czwlzx</editor><author>vip</author><user>czwlzx</user><userface>/UploadFiles/UserPic/UserAvatars/15219_150_150.jpg</userface><Hits>
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   </Stars><Author>vip</Author><infopoint>0</infopoint><Keyword>重力,重心</Keyword><CopyFrom>本站原创</CopyFrom><SoftType></SoftType><CopyrightType></CopyrightType><DecompressPassword></DecompressPassword><OperatingSystem></OperatingSystem><UpdateTime>2004年11月23日</UpdateTime><RegUrl></RegUrl><DemoUrl /><DefaultPicUrl>/UploadFiles/nopic.gif
     </DefaultPicUrl><Intro>分割法可以用来求形状规则，但由不同物质组成的物体的重心。例如由铁和铜两种物质构成的角尺（图5－4），其</Intro><SoftIntro2>分割法可以用来求形状规则，但由不同物质组成的物体的重心。例如由铁和铜两种物质构成的角尺（图5－4），其中铁质部分，尺长50厘米，宽4厘米，厚0．2厘米；铜质的柄长为20厘米，宽4厘米，厚1厘米。下面我们用分割法求这把角尺的重心。

　　由于角尺的尺和柄两部分都是规则、均匀的，它们各自的重心都在自己的几何中心点O1和O2处。所以，角尺的整体重心一定在O1与O2的连线上，如图5－4。假设角尺整体重心在O点，则有G1·O1O＝G2·OO2，其中G1＝ρ铁V铁g＝0．312千克×g，G2＝ρ铜V铜g＝0．712千克。

　　设OO1＝，则G1x＝G2（O1O2－x&lt;SPAN style="FONT-FAMILY</SoftIntro2><SoftIntro>
    【内容简介】分割法可以用来求形状规则，但由不同物质组成的物体的重心。例如由铁和铜两种物质构成的角尺（图5－4），其中铁质部分，尺长50厘米，宽4厘米，厚0．2厘米；铜质的柄长为20厘米，宽4厘米，厚1厘米。下面我们用分割法求这把角尺的重心。

　　由于角尺的尺和柄两部分都是规则、均匀的，它们各自的重心都在自己的几何中心点O1和O2处。所以，角尺的整体重心一定在O1与O2的连线上，如图5－4。假设角尺整体重心在O点，则有G1·O1O＝G2·OO2，其中G1＝ρ铁V铁g＝0．312千克×g，G2＝ρ铜V铜g＝0．712千克。

　　设OO1＝，则G1x＝G2（O1O2－x<SPAN style="FONT-FAMILY</SoftIntro><SoftIntroEncode>分割法可以用来求形状规则，但由不同物质组成的物体的重心。例如由铁和铜两种物质构成的角尺（图5－4），其中铁质部分，尺长50厘米，宽4厘米，厚0．2厘米；铜质</SoftIntroEncode><special /><DownloadUrl></DownloadUrl><Content>分割法可以用来求形状规则，但由不同物质组成的物体的重心。例如由铁和铜两种物质构成的角尺（图&lt;SPAN lang=EN-US&gt;5&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;－&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;），其中铁质部分，尺长&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;50&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，宽&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，厚&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;0&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;．&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;2&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米；铜质的柄长为&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;20&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，宽&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，厚&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;1&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米。下面我们用分割法求这把角尺的重心。&lt;/SPAN&gt;
&lt;P class=MsoNormal align=center&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;&lt;IMG alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/ckzlzx_UploadFiles_2200/20041123124442734.jpg" align=baseline border=0&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;　　由于角尺的尺和柄两部分都是规则、均匀的，它们各自的重心都在自己的几何中心点&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;和&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;处。所以，角尺的整体重心一定在&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;与&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;的连线上，如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;5&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;－&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;。假设角尺整体重心在&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点，则有&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;·&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;·&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;OO&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;，其中&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝ρ&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;铁&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN lang=EN-US&gt;V&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;铁&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN lang=EN-US&gt;g&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;0&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;．&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;312&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;千克×&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;g&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;，&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝ρ&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;铜&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN lang=EN-US&gt;V&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;铜&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;g&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;0&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;．&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;712&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;千克。&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal style="TEXT-ALIGN: center" align=center&gt;&lt;IMG alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/ckzlzx_UploadFiles_2200/20041123124442580.gif" align=baseline border=0&gt;&lt;/P&gt;
&lt;P class=MsoNormal&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;　　设&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;OO&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝，则&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN lang=EN-US&gt;x&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;（&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;－&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;x&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY</Content><banben></banben><area></area><type></type><type2>不限</type2><ico></ico><video>分割法可以用来求形状规则，但由不同物质组成的物体的重心。例如由铁和铜两种物质构成的角尺（图&lt;SPAN lang=EN-US&gt;5&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;－&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;），其中铁质部分，尺长&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;50&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，宽&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，厚&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;0&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;．&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;2&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米；铜质的柄长为&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;20&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，宽&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米，厚&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;1&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;厘米。下面我们用分割法求这把角尺的重心。&lt;/SPAN&gt;
&lt;P class=MsoNormal align=center&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;&lt;IMG alt="" hspace=0 src="PE.SiteConfig.ApplicationPathPE.SiteConfig.uploaddir/ckzlzx_UploadFiles_2200/20041123124442734.jpg" align=baseline border=0&gt;&lt;/SPAN&gt;&lt;/P&gt;
&lt;P class=MsoNormal&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;　　由于角尺的尺和柄两部分都是规则、均匀的，它们各自的重心都在自己的几何中心点&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;和&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;处。所以，角尺的整体重心一定在&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;与&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;的连线上，如图&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;5&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;－&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;4&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;。假设角尺整体重心在&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;点，则有&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;·&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN lang=EN-US&gt;O&lt;/SPAN&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;·&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;OO&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;2&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;，其中&lt;/SPAN&gt;&lt;SPAN lang=EN-US&gt;G&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN lang=EN-US style="mso-bidi-font-size: 10.5pt"&gt;1&lt;/SPAN&gt;&lt;/SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-hansi-font-family: 'Times New Roman'; mso-ascii-font-family: 'Times New Roman'"&gt;＝ρ&lt;/SPAN&gt;&lt;SUB&gt;&lt;SPAN style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-hansi-font-family: 'Times New Roman'; 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<div id="bjtidu_ground" onclick="closeModel()"> </div>
<!-- 这个是用来展示弹框内容的 -->
<div id="login_model"><iframe name='LogOnFrame' id='LogOnFrame' src='' width='300' height='400' fullscreen=true download=false print=false openfile=false frameborder='no' border='0'></iframe></div>
<script>
    /* 打开弹出框的功能 */
   function openModel() {
        document.getElementById("bjtidu_ground").style.display = 'block';
        document.getElementById("login_model").style.display = 'block';
       // 禁止浏览器滚动
        document.body.style.overflow = 'hidden';
    }
    /**
    * 关闭弹出框的功能*/
    function closeModel() {
        document.getElementById("bjtidu_ground").style.display = 'none';
        document.getElementById("login_model").style.display = 'none';
        // 不遮挡后面的内容将body设置为原始样式，也就是实现可滚动
        document.body.style.overflow = 'auto';
    }

  $("#wxlog").click(function(){
    $("#LogOnFrame").attr("src","/qrconn.aspx");
  })

$(function(){
    var ua = navigator.userAgent.toLowerCase(); 
    if(ua.match(/iPad/i)=="ipad" || ua.match(/Mobile/i)=="mobile") { 
     $("#wxlog").hide();
    }
    else{
    }
})
</script>
<script type="text/javascript" src="/Template/Default/Skin/MMskin/js/tools.js"></script>
<script>
(function(){
    var bp = document.createElement('script');
    var curProtocol = window.location.protocol.split(':')[0];
    if (curProtocol === 'https') {
        bp.src = 'https://zz.bdstatic.com/linksubmit/push.js';
    }
    else {
        bp.src = 'http://push.zhanzhang.baidu.com/push.js';
    }
    var s = document.getElementsByTagName("script")[0];
    s.parentNode.insertBefore(bp, s);
})();
</script>


{PE.Label id="A评论标签" nodeId="{PE.Field id="cone" fieldname="NodeID" /}" /}
</body>
</html>