题目6单选题
离心泵的流量调节采用泵的出口阀门开度控制,正确的是( )A. <img src="https://p.ananas.chaoxing.com/star3/origin/d107b912384bcdb169f30d8038c454a1.png">B. <img src="https://p.ananas.chaoxing.com/star3/origin/10e4925fefe5a917eefbf97617e97324.jpg">C. <img src="https://p.ananas.chaoxing.com/star3/origin/38bbba9f5d97a5de2209e89395d11cdc.jpg">D. <img src="https://p.ananas.chaoxing.com/star3/origin/eada38130ff3aba340055db64dbdc428.png">