问题
选择题
P是椭圆
|
答案
F1、F2是椭圆
+x2 5
=1的左、右焦点,y2 4
则F1(-1,0),F2(1,0),
设P(x,y)是椭圆上第一象限的点,则
×2×y=1,y=1,1 2
将y=1代入椭圆方程得:
+x2 5
=1,1 4
∴x=
,15 2
则点P的坐标为(
,1).15 2
故选A.
P是椭圆
|
F1、F2是椭圆
+x2 5
=1的左、右焦点,y2 4
则F1(-1,0),F2(1,0),
设P(x,y)是椭圆上第一象限的点,则
×2×y=1,y=1,1 2
将y=1代入椭圆方程得:
+x2 5
=1,1 4
∴x=
,15 2
则点P的坐标为(
,1).15 2
故选A.
This is John's schedule. | ||
1. Where does John meet Sam? | ||
A. At Dave's house. B. In the hospital. C. At the airport. D. At Kay's house. | ||
2. For how many hours a week does John do his parttime job? | ||
A. Five hours. B. Six hours. C. Ten hours. D. Eleven hours. | ||
3. is ill in hospital. | ||
A. Dental B. Peter C. Dave D. Ted's aunt | ||
4. Kay's birthday is on . | ||
A. Tuesday B. Friday C. Sunday D. Thursday | ||
5. John is going to have an appointment (约会) with Dr Dental at on Thursday. | ||
A.5 :00 - 7 :00 p. m. B. 12 :00 - 5 :00 p. m. C. 10 :30 - 11 :00 a. m. D. 2 :00 - 4 :00 p. m.A.5 :00 - 7 :00 p. m. |