【单选题】【消耗次数：1】
管道以（ ）表示，管件、阀门等以细实线用规定符号画出，并在管道的适当位置画出流向箭头。
①
粗实线
②
细虚线
③
细实线
④
中虚线
参考答案：
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false
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ZH-CN
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mso-tstyle-rowband-size:0;
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mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
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font-size:10.5pt;
mso-bidi-font-size:11.0pt;
font-family:等线;
mso-ascii-font-family:等线;
mso-ascii-theme-font:minor-latin;
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mso-fareast-theme-font:minor-fareast;
mso-hansi-font-family:等线;
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mso-font-kerning:1.0pt;}
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table.MsoNormalTable
{mso-style-name:普通表格;
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
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mso-style-priority:99;
mso-style-parent:"";
mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
mso-para-margin:0cm;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
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mso-bidi-font-size:11.0pt;
font-family:等线;
mso-ascii-font-family:等线;
mso-ascii-theme-font:minor-latin;
mso-fareast-font-family:等线;
mso-fareast-theme-font:minor-fareast;
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mso-style-noshow:yes;
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mso-style-noshow:yes;
mso-style-priority:99;
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mso-para-margin:0cm;
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