若椭圆与双曲线有公共的焦点，其交点为且∠，则△的面积是（）

题干

若椭圆

与双曲线

有公共的焦点

，其交点为

且∠

，则△

的面积是（）

A：

B：

C：

D：

上一题下一题 0.0难度选择题更新时间:2015-01-09 06:08:58

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C

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   The Blacks are English . Now they are in Beijing . This is their first visit to China.
   They are going to stay in China for three weeks . They want to learn some Chinese ,too.
   He likes driving in Beijing very much .Mrs Blacks is a teacher .She often visits a middle school in Beijing ,and she likes to speak with students.
They take a lot of photos in China .When they are back to English ,They’re going to show the photos to their friends. They want the English People to know more about China.

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答案(点此获取答案解析）

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