正确答案: B

叶柄

题目：人们通常食用芹菜的( )。

解析：B

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举一反三的答案和解析：

[单选题]The author mentions Harlow’s experiment to show that ______.

babies need warm physical contact

[单选题]We tried to find a table for seven，but they were all ．

takenupD．usedup

[单选题]细胞分裂时，染色体数目减半发生在分裂后期。( )

错误