物业管理活动的前提条件是（）。
A.行政原则
B.立法原则
C.市场原则
D.关系原则
参考答案：C
— I heard that more than 500 people were killed in ten days during that Cholera outbreak.
— Yes, _____ news came as _____ shock to us. [ ]
A. the; /
B. the; a
C. /; a
D. /; /
孕妇第一产程的疼痛传入神经包括以下哪些（）。
A.T3-4脊神经
B.胸交感神经
C.T11-12脊神经
D.S2-4脊神经
E.腰交感神经
