问题:
A.9000cd,10000cd,13000cd,10000cd
B.13000cd,13000cd,13000cd,13000cd
C.13000cd,13000cd,10000cd,10000cd
D.15000cd,9000cd,10000cd,15000cd"]
下列具闭管式循环的动物是()。 ["A、十二指钩虫","B、中国圆田螺","C、三角帆蚌","D、曼氏无针乌贼"]
腹部膨隆
● 参考解析
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