血型自己不会变

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“天哪,我的血型竟然自己变了!”上星期,本报报道了中国科学家成功地把人体血液由B型转为O型,许女士马上打来电话,她的声音听起来异常兴奋,"我的血型原本是B型,这是我几年前怀孕时在北京一所著名的医院检测得出的结果.
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