正确答案: B

厚壁组织

题目：禾本科植物茎维管束中的维管束鞘为( )。

解析：B

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举一反三的答案和解析：

[单选题]在植物学上称为种子。

花生仁

[单选题]41________

determining

[单选题]

loadB． torn

[单选题]具有根瘤和菌根的植物和微生物的关系是( )。

共生

[单选题]The author intends to .

stress the advantages of TV t o people’s lives

[单选题]If you can't remember someone's name, you may __

tell him the truth B． tell him a white lie

[单选题]What is the message about?

A meeting

[单选题]My friend showed me round the town, was very kind of him.

which

[单选题]What does the author mainly want to express by telling her story?

She valued human feelings more than before.