骨盆轴(axis of pelvis)
骨盆轴(axis of pelvis)
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骨盆轴是通过骨盆腔中心的一条假想线，（）。A、骨盆轴越短，越直，胎儿通过就越容易B、骨盆轴越长，越直，胎儿通过就越容易C、骨盆轴越短，越曲折，胎儿通过就越容易D、骨盆轴越长，越曲折，胎儿通过就越容易
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