【简答题】What can help a seller develop a good habit of full use of his belongings according to the article?
【简答题】已知F 1 ,F 2 是椭圆的两个焦点,过F 1 且与椭圆长轴垂直的直线交椭圆于A,B两点,若△ABF 2 是正三角形,则这个椭圆的离心率是( ) A. 3 3 B. 2 3 C. 2 2 D. 3 2
【单选题】已知F 1 ,F 2 是椭圆的两个焦点,过F 1 且与椭圆长轴垂直的直线交椭圆于A,B两点,若△ABF 2 是正三角形,则这个椭圆的离心率是 [ ]
【简答题】April 27 is a special day in Britain. It’s called Take Our Daughter to Work Day. It was brought to Britain in 1994 from America. On that day thousands of girls take a day off school and go with one of...
【简答题】任务性阅读 April 27 is a special day in Britain. It’s called Take Our Daughter to Work Day. It was brought to Britain in 1994 from America. On that day thousands of girls take a day off school and go wit...
【简答题】已知F 1 、F 2 是椭圆的两个焦点.△F 1 AB为等边三角形,A,B是椭圆上两点且AB过F 2 ,则椭圆离心率是______.
【简答题】补全对话 A: Hello! Welcome to Volunteer Organization. 26 B: I’m ready to do some volunteer work for our city. 27 A: OK. You could help pick up rubbish beside the streets. B: I could do that! By the way, m...
【单选题】关于肝性脑病的诊断,下列哪项是错误的?
C.
扑翼样震颤、血氨增高及脑电图异常同时出现有助于诊断
【多选题】流行性出血热病人组织灌注量不足的护理措施