Whichever they may differ widely in function, all cells have a surrounding membr

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问题 Whichever they may differ widely in function, all cells have a surrounding membrane and an internal, water-rich substance called cytoplasm.

选项

答案 Whichever—However

解析译文：无论细胞之间的功能相差有多大，所有细胞外部都有一层包裹着它的细胞膜，内部有一种富含水分的物质——细胞质。
分析：考查连接词的辨析。Whichever是连接代词，而此处修饰整个从句应用连接副词However，不能用连接代词。

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