不是大便秘结原因的一项是（）
A.湿热
B.热结
C.寒凝
D.阳虚
E.血虚
参考答案：A
简述建设项目管理的类型。
Except on official ______ such as formal receptions, American society has a certain amount of informality.
A. cases B. situations C. events D. occasions
