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【单选题】
下列对各系统描述不正确的是( )。A.
淋巴系统和免疫系统共用一些结构
B.
人体的消化废物经排泄系统排出体外
C.
生殖器官具有内分泌功能
D.
神经系统和内分泌系统共同协调人体的活动
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