简述换填垫层的作用。
(P201)
(1)提高地基持力层的承载力。
(2)减少基础的沉降量。
(3)加速地基的排水固结。
暂无解析
Thebeachisinanideal（）todrawtourists.
GreatasNewtonwas,manyofhisideas____todayandarebeingmodifiedbytheworkofscientistsofourtime.
Howlonghaveyou____?
—Canyoutakethedayofftomorrow?
—Well，I‘allhavetoget（）frommyboss.
Tomhasbeenavegetarian____principleforyears.
