金合金铸造支架常采用的焊接方法是
A．电弧焊B．压力焊C．氢气焊D．激光焊接E．焊料焊接
参考答案：E
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.
堤顶高程的确定因素主要有（）。
A、设计洪水位
B、校核洪水位
C、波浪爬高
D、安全超高
