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【多选题】
以下为水生植物叶的特征的是哪几项?A.
叶片一般形状小，且叶片薄。
B.
表皮细胞壁薄，不角质化或轻度角质化。
C.
胞间隙特别发达，形成通气组织。
D.
叶肉不发达，栅栏组织和海绵组织的分化。
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