A . 肾盂分离中间为液性暗区B . 肾盂分离中间为液性暗区,液性暗区与输尿管相通C . 肾盂分离中间为液性暗区,液性暗区与输尿管相通,液性暗区不相通D . 肾盂分离中间为液性暗区,液性暗区与输尿管相通,液性暗区互不相通,液性暗区液腔饱满E . 肾盂分离中间为液性暗区,液性暗区与输尿管相通,液性暗区液腔饱满
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