问题:
A.9000cd,10000cd,13000cd,10000cdB.13000cd,13000cd,13000cd,13000cdC.13000cd,13000cd,10000cd,10000cdD.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
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