对建设工程风险,常用的组合分解方式是按( )3方面进行风险分解。A.时间维、目标维 发布时间:2018-01-10 20:30 │ 来源:www.tikuol.com 题型:单项选择题 问题: 对建设工程风险,常用的组合分解方式是按( )3方面进行风险分解。A.时间维、目标维和结构维B.时间维、结构维和因素维C.时间维、目标维和因素维D.目标维、结构维和因素维
题型:单项选择题 已知椭圆G:x2a2+y2b2=1(a>b>0)的离心率为22,F1,F2为椭圆G的两个焦点,点P在椭圆G上,且△PF1F2的周长为4+42.(Ⅰ)求椭圆G的方程(Ⅱ)设直线l与椭圆G相交于A、B两点,若OA⊥OB(O为坐标原点),求证:直线l与圆x2+y2=83相切. 查看答案
题型:单项选择题 补全对话。A: Hello, Tom! B: Hello, Jean! A: Long time no see! 1___ did you go on 2___? B: I 3___ to New York City. A: Did you 4___ fun there? B: Yes, I did. A: 5___ was the city? B: It was big and crowded. A: So 6___ you visit Central Park? B: Yes. And it was 7___ beautiful. What 8___ you? A: My vacation was awful. It's always rainy, so I 9___ at home and 10___ TV. 查看答案