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【单选题】
在仿射平面上，若非退化二次曲线与元穷远直线有一个实交点，则此二次曲线是( ).
A.
椭圆
B.
抛物线
C.
双曲线
D.
圆
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】For me, scientific knowledge is divided into mathematical sciences, natural sciences or sciences dealing with natural world, and sciences dealing with mankind. Apart from these sciences is philosophy....
A.
Though
B.
But
C.
And
D.
Nevertheless
【单选题】For me, scientific knowledge is divided into mathematical sciences, natural sciences or sciences dealing with natural world, and sciences dealing with mankind. Apart from these sciences is philosophy....
A.
in addition
B.
in a word
C.
what’s worse
D.
on the contrary