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【单选题】二次曲线 通过点(0,1)的切线方程是( )
A.
y=1或x-y-1=0
B.
y=1或x-y+1=0
C.
x-2y=1或x+y-1=0
D.
x+2y=1或x+y-1=0
【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
相关题目：
【判断题】梁段上无载荷,则剪力为斜直线,弯矩为二次曲线。
A.
正确
B.
错误
【单选题】二次曲线 通过点(0,1)的切线方程是( )
A.
y=1或x-y-1=0
B.
y=1或x-y+1=0
C.
x-2y=1或x+y-1=0
D.
x+2y=1或x+y-1=0
【判断题】二次曲线是线心曲线的充要条件是。（）
A.
正确
B.
错误
【单选题】二次曲线的对称中心是( )
A.
(3, 0)
B.
(0, 3)
C.
(0, 6)
D.
(3, 3)
【判断题】无载荷作用的梁段上，剪力图为斜直线，弯矩图为二次曲线。
A.
正确
B.
错误
【判断题】若弯矩图为二次曲线，则剪力图的大致形状为斜直线。
A.
正确
B.
错误
【单选题】在二次曲线方程的化简中，消去交叉项的过程对应于
A.
坐标系的旋转
B.
坐标系的平移
【单选题】A．斜直线与二次曲线 B．水平线与斜直线 C．都是斜直线 D．水平线与二次曲线
A.
如图5-41所示，梁的剪力图和弯矩图的形状分别为（）。
B.
【单选题】若Ax2+By2=C(AB>0)二次曲线在下列哪种情况下表示椭圆的类型？
A.
A≠B
B.
A=B
C.
ABC>0且A≠B
D.
ABC>0且A=B
【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