皮皮学，免费搜题
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【单选题】
关于血小板的叙述,错误的是
A.
由骨髓中成熟的巨核细胞胞浆裂解、脱落而成
B.
血小板缺乏各种细胞器, 不能独立进行物质代谢
C.
数量上女性比男性稍少
D.
数量少于50×10 9 /L 时, 人体可出现异常出血现象
E.
血小板内含收缩蛋白, 可使血凝块紧缩
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