答案：D
What do economists think of working hours in Asia
A．They don’t think that the working hours need reducing.
B．They think that a flexible working schedule is also desirable.
C．They think that working hours have declined satisfactorily.
D．They believe the flexible working hours benefit workers only.
采用抗滑桩加固边坡时，抗滑桩埋入滑动面以下的长度为整个桩长的多少？（）
A.1／4～1／3
B.1／3～1／2
C.0.5～1.0倍
D.1.0～1.5倍
