[单选题]Enzymes are proteins that may be either isolated molecules in solution (homogeneous) or molecules bound to large macromolecules or to a cell wall (heterogeneous).句中 that 为关系代词,引导( )从句,指代 proteins。
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2023-10-01 08:00:40
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[单选题]Enzymes are proteins that may be either isolated molecules in solution (homogeneous) or molecules bound to large macromolecules or to a cell wall (heterogeneous).句中 that 为关系代词,引导( )从句,指代 proteins。

A.条件状语
B.定语
C.宾语
D.时间状语
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