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8.在抛物线6ec8aac122bd4f6e上,横坐标为4的点到焦点的距离为5,则p的值为 

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A.6ec8aac122bd4f6e          B.6ec8aac122bd4f6e                         C.6ec8aac122bd4f6e6ec8aac122bd4f6e         D.6ec8aac122bd4f6e6ec8aac122bd4f6e

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7.在△ABC中,角A、B、C的对边分别为a、b、c,若6ec8aac122bd4f6e,则角B的值是                                                                      

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6.设曲线6ec8aac122bd4f6e在点(1,1)处的切线与直线ax+y+1=0平行,则6ec8aac122bd4f6e

A.1                    B.-1                         C.2                           D.-2

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A6ec8aac122bd4f6e                B6ec8aac122bd4f6e                       C6ec8aac122bd4f6e                    D6ec8aac122bd4f6e

≥0

≥0

A3                    B2                    C1                           D0

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4.已知双曲线6ec8aac122bd4f6e的两个焦点坐标分别为6ec8aac122bd4f6e, 则双曲线的离心率为                                                                 

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A6ec8aac122bd4f6e                         B6ec8aac122bd4f6e              C6ec8aac122bd4f6e                      D1

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3.在等差数列6ec8aac122bd4f6e中,若6ec8aac122bd4f6e,则6ec8aac122bd4f6e              

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A.3                           B.12                         C.6ec8aac122bd4f6e                       D.6ec8aac122bd4f6e

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2.已知向量6ec8aac122bd4f6e6ec8aac122bd4f6e6ec8aac122bd4f6e6ec8aac122bd4f6e且a⊥b ,则6ec8aac122bd4f6e         

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