我国在建筑上呈现南尖北平的形式，与此直接相关的是[ ]
A、降水的多少
B、地势的不同
C、气温的高低
D、植被的不同
答案：A
Lewin was interested in taking research beyond books and looking at how it could ____ real social change
A．bring up
B．bring about
C．bring in
D．bring out
子宫脱垂的主要原因是( )
A．营养不良B．手术损伤C．分娩损伤D．慢性疾病E．过度负重
