打孔
参考答案：
是草坪养护的一种常用手段，它用专用的打孔器具在板结或粘重的的土壤上打出一系列的空洞，以改善草坪根部土壤的通气、透水性状。
—Hi, Tom. Is your brother as active as you?
—No, he's a quiet boy. He is _________.[ ]
A. less outgoing than me
B. not so calm as I
C. more active than I
D. as outgoing as I
在Word中设置页边距，一定会影响所有的页面。
