简述愈伤组织的概念。
参考答案：
是从外植物体的离体材料组织增生的细胞产生的一团不定型的疏散排列的薄壁细胞，是分化的，而且还未形成组织的结构。
单词题。
1. How _____ sheep are there on the hill? (much)
2. I don't like to drink m_____, but I like yogurt.
3. Put _____ (they) on the sandwich, please.
4. You need _____ (add) some red sugar to the soup.
5. How do you make a banana _____ _____ (奶昔)?
6. Finally put the three s_____ of chicken toghter.
7. January is the f_____ month of the year.
8. My book is on the t_____ of the bookshelf.
融资租入的固定资产视为自有固定资产核算，应按月计提折旧。（）
okshelf.