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新生儿小肠上皮细胞通过消耗ATP,可以直接吸收母乳中的免疫球蛋白和半乳糖。这两种物质分别被吸收到血液中的方式是                                                              (   )
A.主动运输、主动运输B.胞吞、主动运输
C.主动运输、胞吞D.被动运输、主动运输
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