杨树

The secondary popular and birch forest is the pioneer community after the Broadleaved Korean pine forest.

杨树和桦树都是生长速度快的强阳性树种，阔叶红松林一经破坏，它们首先占据采伐和火烧迹地，迅速成林。

The results showed that, the oligosaccharides have elicitor activity, and could induce the notable increase of PAL, chitinase,β-1, 3-glucanase activity and accumulation of hydroxyproline-rich glucoprotein and lignin.

结果表明，该低聚糖具有明显的激发子活性，能够诱导杨树细胞苯丙氨酸解氨酶、几丁质酶、β-1，3-葡聚糖酶活性显著增高（分别为对照的2.80，1.99，2.84倍）和木质素、HRGP的积累（分别为对照的2.35，2.61倍）。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。