“教学与发展”理论的倡导者是()。
A.赞科夫
B.皮亚杰
C.布鲁纳
D.根舍因
参考答案:A
____ to hospital in time, the wounded soldiers were saved at last.
A.Taken
B.Taking
C.Having taken
D.Being taken
当路基设计标高低于原地面标高时,需要挖方路基,一般每侧要比路面宽出( )。
A.200~400mm
B.400~500mm
C.300~500mm
D.500~1000mm