正确答案: B

错误

题目：十字花科子房常有次生假隔膜，故形成中轴胎座。( )

解析：B

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举一反三的答案和解析：

[单选题]

still

[单选题]Who probably wrote the letter?

An editor.

[单选题]二体雄蕊就是一朵花中只有两个离生的雄蕊。( )

错误

[单选题]46 A so far B neither C no longer D already

no longer

[单选题]Mother wanted to be a good provider, a role she _____ since her marriage to Father.

has been shouldering