哪一种情况下可发生血钾浓度降低？（）
A．高热
B．创伤
C．酸中毒
D．急性肾衰竭
E．严重呕吐、腹泻
参考答案：E
简述性心理的概念。
An investor has gathered the following data, presented on an annual basis, for an apartment complex that is being considered for purchase: Gross potential rental income $176000 Insurance and taxes$15000 Utilities $11400 Repairs and maintenance $17350 Depreciation$21000 The annual net operating income (NOI) for the apartment complex is closest to:（）
A. $100000.
B. $116000.
C. $132250.
