正确答案: A

正确

题目：心皮是构成雌蕊的基本单位，是适应生殖的变态叶。( )

解析：A

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举一反三的答案和解析：

[单选题]If we ___ the other road ,we might have arrived here in time for the meeting.

had taken

解析：

考查虚拟语气。所填词做虚拟语气中条件状语从句的谓语，根据主句的谓语动词形式might have arrived可知题干是与过去事实相反，故所填部分用had+过去分词形式，选B。

[单选题]_________________

ideas

[单选题]______ the police thought he was the most likely one, since they had no exact proof about it, they could not arrest him.

Although

[单选题]有转主寄生现象的真菌是( )。

锈菌

[单选题]

mattered

[单选题]Everybody was touched _____ words after they heard her moving story.

beyond B． without

[单选题]苔藓植物的孢子萌发形成原叶体。( )

错误