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- 国家电网试题
答案:
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1.sjaueam e u!'z
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2.u u), uis uni'z
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3.{u,v,w}/.u→v/.v→z? {w,z,w}{z,z,w}{w,w,z}{z,w,w}
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4.{u,v,w}/.u→v/.v→z
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5.A.h(t) = e t u(t) e -2t u(t)B.h(t) = e -t u(-t) e -2t u(t)C.h(t) = u(t)D.h(t) = e -t u(t) e -2t
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6.设 z = f(u, v),u = φ(x, y),v = ψ(x, y),则∂z/∂x = ( )
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7.(至少找出7个)b r o t h e r s p i t y r s e a k u a i u t z o p o v l m c d
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8.[ e –t* u(t) ] ’=
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9.[ e –t u(t) ] ’=
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10.Vx(7E(x,o)> ( y(E(y, g(x))A ze(z, g(x))> E(y, z))