次生木质部发育. Ⅰ. 针叶树 : 木材生成机理重要部分. Ⅰ. Coniferous tree : an important part of wood formation mechanism.pdf
本书介绍了次生木质部发育研究发育采用的一些新概念和措施：生长鞘、两向生长树龄及其组合、树株内取样要求和必要的图示方式等。依据遗传特征证明次生木质部发育是树木生长中必然发生的自然现象，用生存适应分析它的形成。
important
Marketing is important _____ we’re hiring a new public relations firm.
Marketing is important \_\_\_\__ we’re hiring a new public relations firm.
I don’t think it’s important, _____?
I don’t think it’s important, \_\_\_\__?
As I was growing up, my life went around soccer(足球). I played on the national youth soccer teams, and traveled to Europe. At age fifteen, I spent a summer (56)_____ with a professional team in England. I always knew I was going to be a professional
As I was growing up, my life went around soccer(足球). I played on the national youth soccer teams, and traveled to Europe. At age fifteen, I spent a summer (56)\_\_\_\__ with a professional team in E
I believe you have ______ some important points in the report.
I believe you have ______ some important points in the report. D