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document.write('    	<td height="18" bgcolor="#EDECE9">·[] 发表评论于 2009/4/16 23:02:46</td>');
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document.write('    	<td style="line-height:24px;font-size:14px;">&nbsp;详细的有吗？</td>');
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document.write('    	<td height="18" bgcolor="#EDECE9">·[AA] 发表评论于 2009/3/3 21:56:44</td>');
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document.write('    	<td style="line-height:24px;font-size:14px;">&nbsp;图上的这些发光二极管电流一般不超过20毫安，压降每只大约3.3V,根据电路结构串并联，电压等信息进行计算得到电阻大小。</td>');
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document.write('    	<td height="18" bgcolor="#EDECE9">·[] 发表评论于 2009/3/3 19:51:30</td>');
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document.write('    	<td style="line-height:24px;font-size:14px;">&nbsp;电阻单元是多少?</td>');
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document.write('    	<td height="18" bgcolor="#EDECE9">·[] 发表评论于 2008/2/13 21:33:59</td>');
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document.write('    	<td style="line-height:24px;font-size:14px;">&nbsp;不错,顶一下</td>');
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document.write('    	<td height="18" bgcolor="#EDECE9">·[AA] 发表评论于 2008/1/13 23:20:52</td>');
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document.write('    	<td style="line-height:24px;font-size:14px;">&nbsp;很简单的了，发光二极管与电阻串联起来就可以了</td>');
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document.write('    	<td height="18" bgcolor="#EDECE9">·[] 发表评论于 2008/1/12 15:33:42</td>');
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document.write('    	<td style="line-height:24px;font-size:14px;">&nbsp;为何不显示制作电路呀</td>');
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