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已知抛物线,则它的准线方程是A.y=-1B.C.D.
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已知抛物线
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADEAAAAjCAYAAAA9guKMAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAGkSURBVFhH7ZiNEYMgDIWZjJ1Yh2UyCqOkCYgC
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qf3GrewCZa3uhyCdIQwAhlY1WqKQOvrud2k6Q+w2yNa6OwQrcTs7xUqQ7M1V4BX+aCdQipbr8foT
BNuoS3VdKp7rFaJqjWvNjpI5ygP6nAL5TVw5ttbyFMKW1CVK27GXrerwBPpuvCYs+5Ok7ZLAZZsE
5SwW7SVT4hclDGrJswsDzBVlzAyHoONmu9rJ2aYe4Eou+HO8Ht+u2TRLKxegTsaeLSeYeAIL7Q3n
7L2Nb3pX5lcI4E78wyRZ5vaSs9nqCwQFWmWGTwvhewAnkiXOlNCSZdue6yAk5cHRtEC2DEZrX6m6
dLUztCDiyamuSh3n62mfOFu61e++H+Xil1ajdM05IKzXqeoE3ndF5lidEGQCCNqoSjZc+Nw9HAKU
/4PgWtRz9h0LEVXBm0Kss1EyYJY+OY5VIvLGTZWI/f1CtGpX4+4zUU7UB+GFqI9d2ys/J0BopAcm
UFIAAAAASUVORK5CYII=
)
,则它的准线方程是( )
A.y=-1
B.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAjCAYAAADmOUiuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAE2SURBVFhH7VdbDsQgCPRk3onrcBmP4lFYbH21
tg1GkuXDTZpNEx7jMIB1ZPznjOOjDVBcoYjknSeMVw8bDAYg5xw/VgEepAWCDVAsuCfDzeASfVuD
q/QZZ/AY0mkOng+Edl7xoC7Okn8FOmsIMUDNpDOxXIBMrUeqazCtnv59JqKy7cngw6IO2AFeSFoJ
6DRWZdKL7SVHLvF9igfC27VCor1iM3Oer7gpTgewdU9k9rpGmsmnbpsBRkKfAXK54X4pU08rD3gB
6Jk5MNIc5Qh1zJxihj+XtqtkRtgAKnWtvHijZUQ/bpLI06/qbyX6qu+hfZ4epRcKg0/fAau55v2Z
JEhz96PE80H1PAKUjyWLAHmttoViEODbKvR5Fhu7zRhk8KrkDVCvs4dVpx9aJ6KxJhkPZR7gDyKc
0AMv4JELAAAAAElFTkSuQmCC
)
C.
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAjCAYAAABsFtHvAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAE0SURBVFhH7VbbDYMwDPRk2cnrZJmMklFc5/0A
gU2b8gGVUEFyfLHv/AC68Qc3YtMDwL0lA4asH/O8PnKHBAD83AEeg3WEL3hH+3rO37Q/T3CxwYQ6
Tw+6pjix4Mphyb90XojBpQ41duAwp8RYqq03tMT+W+NRYZsi32n8znaXUTjUmOa0z73XkZ1GkITr
YlMucHQm2HTgTYmeo+5EqQlGZZvBPVmTwZkCnAevyqXceAA3HDH+QWiVlvKSVI+/T/fQZMaFotb5
GnUnOk2m0VszlDB4ru7Kt5wuoeVURXGlatnlatjuVkLPIrNIZ9ZReL/U20VIu0Yps/NQ6er8uuvz
kwyOyFW03WAXD5YQdaN1rqi14JuZMQpwLXjc11up0az2c86+tJA0mS8hLh1fnPbjOz0X/AOoieqN
OPyn3wAAAABJRU5ErkJggg==
)
D.
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已知抛物线
,则它的准线方程是( )
A.y=-1
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACgAAAAjCAYAAADmOUiuAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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C.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAB8AAAAjCAYAAABsFtHvAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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=1(a>0,b>0)的离心率为
,且它的一条准线与抛物线y2=4x的准线重合,则此双曲线的方程为( )
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=1
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=1(a>0,b>0)的离心率为
,且它的一条准线与抛物线y2=4x的准线重合,则此双曲线的方程为( )
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=1
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=1
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=1(a>0,b>0)的离心率为
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=1
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