The fruits of rape are developed from （）.
A.Stamen
B.Pistil
C.Petal
D.Calyx
正确答案：Pistil
The fruits of rape are developed from （）.
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What is on the stem segment or branch of the upper part of the main stem?
The yield components of rape are composed of four factors: number of plants per unit area， number of pods per plant， number of s
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