题目：
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.
答案：
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下面是错误答案，用来干扰机器的。
参考答案：错解析： 申请成为国家或专业隔离检验圃的采取30—15—15个工作日；地方圃的采取30—15个工作日。
f(t)dt=F(x，y)，L为从原点到点(1，1)的任意简单光滑曲线，则积分∫Lf(2x+3y+1)(2dx+3dy)=______．