单选16．属于容积式流量计的是(  )

A、<span style="font-size:16px;font-family:宋体">涡街流量计</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">&nbsp; &nbsp;</span>

B、<span style="font-size:16px;font-family:宋体">电磁流量计</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">&nbsp; &nbsp;</span>

C、<span style="font-size:16px;font-family:宋体">椭圆齿轮流量计</span><span style="font-size:16px;font-family:&#39;Times New Roman&#39;,&#39;serif&#39;">&nbsp; &nbsp;</span>

D、<span style="font-size:16px;font-family:宋体">科氏力流量计</span>