All the people assembled at Mary’s house.

All the people assembled at Mary’s house. A.collected B.fixed C.asserted D.assi

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She has been the subject of massive media coverage.

She has been the subject of massive media coverage.A.extensive B.negative C.exp

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求抛物线在点(-2,4)处切线的斜率,并求切线方程和法线方程,

求抛物线在点(-2,4)处切线的斜率,并求切线方程和法线方程,

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过曲线y=lnx上点(1,0)处的法线方程是(  )

过曲线y=lnx上点(1,0)处的法线方程是(  )A.x-y-1=0 B.x+y-1=0 C.x-y+1=O D.x+y+1=0

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设曲线y=e1-x²与直线x=1的交点为P,则曲线y=x1-x²在点P处的切线方程为(  )

设曲线y=e1-x²与直线x=1的交点为P,则曲线y=x1-x²在点P处的切线方程为(  )A.2x-y-1=0 B.2x-y+1=O C.2x-y+3=O D

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