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【简答题】
已知抛物线 的焦点为F 2 ，点F 1 与F 2 关于坐标原点对称，以F 1 ,F 2 为焦点的椭圆C过点 . （Ⅰ）求椭圆C的标准方程； （Ⅱ）设点 ，过点F 2 作直线 与椭圆C交于A,B两点，且 ，若 的取值范围.
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【简答题】A．It took a long time to finish the building. B．He was too busy to notice the opening of the hotel. C．He did not know the hotel had a restaurant. D．He would like to meet the woman for brunch next Sund...
【单选题】It took usquite a long time to get here. Itwas journey.
A.
three-hour
B.
a three hour
C.
athree-hour
D.
three hours
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A.
for
B.
and
C.
but
D.
or
【单选题】It took me a long time to to the directions.
A.
catch up
B.
catch on
C.
catching up
D.
catching on
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【简答题】公共区域在一些饭店被称为厅堂组、通常被称为( )。A. PA组 B．PC组 C．AP组 D．CP组
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