69．影响声强的因素不包括
<script>function viewparser(etype,eid){showWindow("showMsgBox", "plugin.php?id=tpgao_questionsyn:showMsg&timutype="+etype+"&item="+eid+"&credit=3&mod=sh", "get", 0);
}</script>[普通选择题]<br> 题目 69．影响声强的因素不包括<br><br><img src=""><br>A.声波的振幅<br>B.声波的频率<br>C.声压<br>D.介质的体积<br>E.介质的密度<br><br>正确答案：D<br><div id="parserbtn"><input class="parserbtn"onclick="viewparser(1,11375);" type="button" name="parserbtn" value="查看解析" style="height: 23px"></div><br>
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