选择题:双子叶植物叶的脉序通常为( )。A.二歧脉序B.弧形脉序C.网状脉序D.直出平行脉

题目内容:

双子叶植物叶的脉序通常为( )。
A.二歧脉序
B.弧形脉序
C.网状脉序
D.直出平行脉
参考答案:

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