正确答案: A

正确

题目：叶内中脉的韧皮部靠：近下表皮。( )

解析：A

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举一反三的答案和解析：

[单选题]胚囊中的卵器指( )。

1个卵细胞和2个助细胞

[单选题]艾丁湖1万多年来变迁的主要原因是

气候变干

[单选题]Some people are against killing wolves because ．

wolves help to keep the ecological balance in the wildemess

[单选题]The old man asked Lucy to move to another chair _______ he wanted to sit next to his wife.

because

[多选题]在藻类植物生活史中，核相交替与世代交替的关系正确的是( )。

有世代交替就一定有核相交替

有核相交替不一定有世代交替

没有核相交替就一定没有世代交替

解析：BCD

[单选题]裸子植物的雄配子体只具一个精子，所以不能进行双受精。( )

错误

[单选题]One of the disadvantages of traveling as an air courier is that he_____.

cannot take any luggage with him