正确答案: D

荚果

题目：豆目(或豆科)三科(亚科)最重要的共同特征是( )。

解析：D

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举一反三的答案和解析：

[单选题]牡丹和芍药既是名花又是药用植物，其药用部位( )。

根

[单选题]蕨类植物的孢子萌发形成原丝体。( )

错误

解析：解析：蕨类植物的孢子萌发形成原叶体，即配子体。

[单选题]BHaving a husband means an extra seven hours of housework each week for women, according to a new study. For men, getting married saves an hour of housework a week. “It’s a well-known pattern,” said lead researcher Frank Stafford at University of Michigan’s Institute for Social Research. “Men usually work more outside the home, while women take on more of the housework.”

is the main breadwinner D． is the master of the house