论述未来森林培育工作发展的趋势。
参考答案：
随着可持续发展战略在全球的普及，林业也必须走可持续发展的道路。
Peter has been busy these days and seldom ________ to come over to have a chat with me.
[ ]
A. doesn't he have time
B. does he have time
C. he has time
D. he hasn't time
分泌胃蛋白酶原的是
A．壁细胞B．主细胞C．黏液细胞D．肠嗜铬样细胞
