• 2022-06-03 问题

    [(x-y)^3×(√x+√y)^(-3)+3(x√y-y√x)]/(x√x+y√y)

    [(x-y)^3×(√x+√y)^(-3)+3(x√y-y√x)]/(x√x+y√y)

  • 2022-06-11 问题

    >;>;>;x,y,z=3,'three','3.0'>;>;>;x,y,z[3,'three','3.0']此运行结果是正确的

    >;>;>;x,y,z=3,'three','3.0'>;>;>;x,y,z[3,'three','3.0']此运行结果是正确的

  • 2022-07-29 问题

    N=3x&#91;sup&#93;3&#91;/&#93;-2y&#91;sup&#93;4&#91;/&#93;其绝对误差为() A: △N=9x<sup>2</sup>△x-8y<sup>3</sup>△y B: △N=3△x+2△y C: △N=9x<sup>2</sup>△x+8y<sup>3</sup>△y D: △N=9△x-8△y

    N=3x&#91;sup&#93;3&#91;/&#93;-2y&#91;sup&#93;4&#91;/&#93;其绝对误差为() A: △N=9x<sup>2</sup>△x-8y<sup>3</sup>△y B: △N=3△x+2△y C: △N=9x<sup>2</sup>△x+8y<sup>3</sup>△y D: △N=9△x-8△y

  • 2022-06-12 问题

    指出下列函数的复合过程:(1)y=cos2x;(2)y=e3x;(3)y=esin3x;(4)y=arcsin&#91;1g(2x+1)&#93;

    指出下列函数的复合过程:(1)y=cos2x;(2)y=e3x;(3)y=esin3x;(4)y=arcsin&#91;1g(2x+1)&#93;

  • 2022-07-23 问题

    下列曲线中有拐点(0,0)的是&#91;&#93;. A: y=x2 B: y=x3 C: y=x4 D: y=x2/3

    下列曲线中有拐点(0,0)的是&#91;&#93;. A: y=x2 B: y=x3 C: y=x4 D: y=x2/3

  • 2022-06-05 问题

    3、反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是..(A)v=kc(X)&#91;c(Y)&#93;2;(B)v=kc(X)&#91;c(Y)&#93;3/2;(C)v=k&#91;c(X)&#93;2c(Y);(D)v=k&#91;c(X)&#93;0&#91;c(Y)&#93;2 A: (A) v = k c (X)[c (Y)]2; B: (B) v = k c (X)[ c (Y)]3/2; C: (C) v = k[c (X)]2 c (Y); D: (D) v = k [c (X)]0[ c (Y)]2

    3、反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是..(A)v=kc(X)&#91;c(Y)&#93;2;(B)v=kc(X)&#91;c(Y)&#93;3/2;(C)v=k&#91;c(X)&#93;2c(Y);(D)v=k&#91;c(X)&#93;0&#91;c(Y)&#93;2 A: (A) v = k c (X)[c (Y)]2; B: (B) v = k c (X)[ c (Y)]3/2; C: (C) v = k[c (X)]2 c (Y); D: (D) v = k [c (X)]0[ c (Y)]2

  • 2022-06-03 问题

    3 、 反应 X + 2Y → Z 是一个 2.5 级反应,下面的速率方程式中,可能正确的是 . . (A) v = k c (X)&#91; c (Y)&#93; 2 ; (B) v = k c (X)&#91; c (Y)&#93; 3/2 ; (C) v = k &#91; c (X)&#93; 2 c (Y) ; (D) v = k &#91; c (X)&#93; 0 &#91; c (Y)&#93; 2

    3 、 反应 X + 2Y → Z 是一个 2.5 级反应,下面的速率方程式中,可能正确的是 . . (A) v = k c (X)&#91; c (Y)&#93; 2 ; (B) v = k c (X)&#91; c (Y)&#93; 3/2 ; (C) v = k &#91; c (X)&#93; 2 c (Y) ; (D) v = k &#91; c (X)&#93; 0 &#91; c (Y)&#93; 2

  • 2022-07-01 问题

    求y=-3sin(2x-π/3)x∈&#91;-π,π&#93;的单调递增区间

    求y=-3sin(2x-π/3)x∈&#91;-π,π&#93;的单调递增区间

  • 2022-06-05 问题

    反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是()(A)v=kc(X)&#91;c(Y)&#93;2;(B)v=kc(X)&#91;c(Y)&#93;3/2;(C)v=k&#91;c(X)&#93;2c(Y);(D)v=k&#91;c(X)&#93;0&#91;c(Y)&#93;2 A: v = k c (X)[c (Y)]2; B: v = k c (X)[ c (Y)]3/2; C: v = k[c (X)]2 c (Y); D: v = k [c (X)]0[ c (Y)]2

    反应X+2Y→Z是一个2.5级反应,下面的速率方程式中,可能正确的是()(A)v=kc(X)&#91;c(Y)&#93;2;(B)v=kc(X)&#91;c(Y)&#93;3/2;(C)v=k&#91;c(X)&#93;2c(Y);(D)v=k&#91;c(X)&#93;0&#91;c(Y)&#93;2 A: v = k c (X)[c (Y)]2; B: v = k c (X)[ c (Y)]3/2; C: v = k[c (X)]2 c (Y); D: v = k [c (X)]0[ c (Y)]2

  • 2022-06-19 问题

    The result of the following program is ( ).x=&#91;0,1,1,0,0&#93;; y=&#91;0,0,1,1,0&#93;; for n=1:3 plot(n*x,n*y) hold on end axis equal A: 3 rectangles with lower-left corner at the origin B: 3 rectangles with center at origin C: 3 straight lines D: 15 points

    The result of the following program is ( ).x=&#91;0,1,1,0,0&#93;; y=&#91;0,0,1,1,0&#93;; for n=1:3 plot(n*x,n*y) hold on end axis equal A: 3 rectangles with lower-left corner at the origin B: 3 rectangles with center at origin C: 3 straight lines D: 15 points

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