正确答案: A

叶鞘

题目：棕榈科为重要的纤维植物，其纤维主要来自( )。

解析：A

查看原题 点击获取本科目所有试题

举一反三的答案和解析：

[单选题]蓼科植物营养器官最突出的特征是( )。

具膜质托叶鞘

[单选题]根据文章，回答 60～63 问题BIt was the first mow of winter -- an exciting day for every, child but not for most tether. Up until now, l had been able to dress myself for recess(课间休息), but today I would need some help. Miss Finlayson, my kindergarten teacher at Princess Elizabeth School near Hamilton, Ontario, had been through first snow days ,tony times in her long career, but I think struggled still remember this one.

the jacket and the boots

[单选题]三尖杉属又称榧树属。( )

错误

解析：解析：“榧树属”改为“粗榧属”。

[单选题]Why was the woman at the airport?

She was seeing the man off .

[单选题]what was mrs.franks ding doing when the accident took place?

standing outside a bank

[多选题]在下列特征中，属于兰科的是( )。

唇瓣

合蕊柱

花粉块

子房扭曲180°

解析：ACDE

[单选题]棉花茎的维管束属于( )。

外韧维管束