• 2022-05-28 问题

    描述下列每种变化如何影响[tex=1.214x1.286]+rd7e/Fdzb9kUUe14sxWFw==[/tex]与/或[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]曲线。税收下降。

    描述下列每种变化如何影响[tex=1.214x1.286]+rd7e/Fdzb9kUUe14sxWFw==[/tex]与/或[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]曲线。税收下降。

  • 2022-06-09 问题

    设函数[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]可导,且[tex=3.929x1.286]rry4HS9j03SSzVB9RUT23Q==[/tex]。曲线[tex=3.714x1.286]ILxTGSNsFVqbb4UrB1q2og==[/tex]([tex=2.357x1.286]qp1mMhMi7/RXytudIwJi8A==[/tex])经过坐标原点[tex=0.786x1.286]/aLPP1sXG9WQPxIsGVtWrg==[/tex],其上任意一点[tex=1.071x1.286]/vZEgalrrOYkhzS9SMg+fg==[/tex]处的切线与[tex=0.571x1.286]XubEW9+1+hkJqH7jXe5MrA==[/tex]轴交于[tex=0.714x1.286]atrPPistVyxj7cY8rjePCQ==[/tex],又[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]垂直[tex=0.571x1.286]XubEW9+1+hkJqH7jXe5MrA==[/tex]轴于点[tex=0.786x1.286]dSWbQCTjdbLxKy7q0ps2gg==[/tex]。已知由曲线[tex=3.714x1.286]ILxTGSNsFVqbb4UrB1q2og==[/tex],直线[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]以及[tex=0.571x1.286]XubEW9+1+hkJqH7jXe5MrA==[/tex]轴所围图形的面积与[tex=3.429x1.286]qibWguSxm+dL9yvgbvPQChNyqmA02j7kdcuoW6itmdg=[/tex]的面积之比恒为3:2,求满足上述条件的曲线的方程。

    设函数[tex=1.857x1.286]G6WxJ307HB2e1l7Qz3uNbQ==[/tex]可导,且[tex=3.929x1.286]rry4HS9j03SSzVB9RUT23Q==[/tex]。曲线[tex=3.714x1.286]ILxTGSNsFVqbb4UrB1q2og==[/tex]([tex=2.357x1.286]qp1mMhMi7/RXytudIwJi8A==[/tex])经过坐标原点[tex=0.786x1.286]/aLPP1sXG9WQPxIsGVtWrg==[/tex],其上任意一点[tex=1.071x1.286]/vZEgalrrOYkhzS9SMg+fg==[/tex]处的切线与[tex=0.571x1.286]XubEW9+1+hkJqH7jXe5MrA==[/tex]轴交于[tex=0.714x1.286]atrPPistVyxj7cY8rjePCQ==[/tex],又[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]垂直[tex=0.571x1.286]XubEW9+1+hkJqH7jXe5MrA==[/tex]轴于点[tex=0.786x1.286]dSWbQCTjdbLxKy7q0ps2gg==[/tex]。已知由曲线[tex=3.714x1.286]ILxTGSNsFVqbb4UrB1q2og==[/tex],直线[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]以及[tex=0.571x1.286]XubEW9+1+hkJqH7jXe5MrA==[/tex]轴所围图形的面积与[tex=3.429x1.286]qibWguSxm+dL9yvgbvPQChNyqmA02j7kdcuoW6itmdg=[/tex]的面积之比恒为3:2,求满足上述条件的曲线的方程。

  • 2022-07-28 问题

    外汇市场干预。设中央银行通过出售美元购买外币而干预外汇市场。在这种干预情形下, [tex=1.786x1.286]nsrQ07qdCLKKEMj/mTnpcg==[/tex]与[tex=1.571x1.286]YoSrDQ18SyR1Ho5cpcmjOw==[/tex]的总和必须等于正值, 而非为零。在浮动汇率、静态真实汇率预期以及不完善资本流动的条件下, 这种干预对[tex=1.214x1.286]+rd7e/Fdzb9kUUe14sxWFw==[/tex]和/或[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]曲线的影响是什么?

    外汇市场干预。设中央银行通过出售美元购买外币而干预外汇市场。在这种干预情形下, [tex=1.786x1.286]nsrQ07qdCLKKEMj/mTnpcg==[/tex]与[tex=1.571x1.286]YoSrDQ18SyR1Ho5cpcmjOw==[/tex]的总和必须等于正值, 而非为零。在浮动汇率、静态真实汇率预期以及不完善资本流动的条件下, 这种干预对[tex=1.214x1.286]+rd7e/Fdzb9kUUe14sxWFw==[/tex]和/或[tex=1.857x1.286]1+HEaQOQidhevgGS+vzRCA==[/tex]曲线的影响是什么?

  • 2022-06-01 问题

    for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是:__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

    for i in range(b.max_row): for j in range(b.max_column): print(b.cell(row=i,column=j).value)上面语句运行的结果是:__________。 A: 1 1 1 1 1 1 1 1 1 1 B: 1111111111 C: 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 D: 出现异常

  • 2021-04-14 问题

    【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1

    【单选题】CDMA通信的基站,假定基站A的码片序列是+1 +1 +1 -1 -1 +1 -1 -1,基站发射bit为101时,实际发射的信号是 A. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 B. +1 +1 +1 -1 -1 +1 -1 -1 –1 –1 –1 +1 +1 –1 +1 +1 +1 +1 +1 -1 -1 +1 -1 -1 C. +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 +1 +1 +1 -1 -1 +1 -1 -1 D. –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1 –1 –1 –1 +1 +1 –1 +1 +1

  • 2022-06-01 问题

    for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是()。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1

    for i in range(1,11): for j in range(1,11): b.cell(row=i,column=j).value=1 #b是一个工作表对象for i in range(1,11): for j in range(1,11): print(b.cell(row=i,column=j).value,end=" ") print()上面程序代码运行的结果是()。 A: 1 B: 1 1 1 1 1 1 1 1 1 1 C: 1111111111 D: 1 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 1

  • 2022-10-25 问题

    下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )

    下列哪个码片序列不能用于CDMA通信 A: ( -1 -1 -1 +1 +1 -1 +1 +1 ) B: ( -1 -1 +1 -1 +1 +1 +1 -1 ) C: ( -1 +1 -1 +1 +1 -1 -1 -1 ) D: ( -1 +1 -1 -1 -1 -1 +1 -1 )

  • 2021-04-14 问题

    请仔细观察下面行列式的计算过程,如果四个等号都理解了,请选择A,否则请选择B。 | a 1 1 1 1 | |a+4 a+4 a+4 a+4 a+4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a+4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a+4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a+4)(a–1)^4

    请仔细观察下面行列式的计算过程,如果四个等号都理解了,请选择A,否则请选择B。 | a 1 1 1 1 | |a+4 a+4 a+4 a+4 a+4| | 1 a 1 1 1 | | 1 a 1 1 1 | | 1 1 a 1 1 |= | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 a | | 1 1 1 1 1 | | 1 a 1 1 1 | =(a+4) | 1 1 a 1 1 | | 1 1 1 a 1 | | 1 1 1 1 a | | 1 1 1 1 1 | | 0 a–1 0 0 0 | =(a+4) | 0 0 a–1 0 0 | | 0 0 0 a–1 0 | | 0 0 0 0 a–1 | =(a+4)(a–1)^4

  • 2021-04-14 问题

    共有4个站进行码分多址通信。4个站的码片序列为:a:(-1 -1 -1 +1 +1 -1 +1 +1) b:(-1 -1 +1 -1 +1 +1 +1 -1) c:(-1 +1 -1 +1 +1 +1 -1 -1) d:(-1 +1 -1 -1 -1 -1 +1 -1) 现收到这样的码片序列:(-1 +1 -3 +1 -1 -3 +1 +1),则( )发送1。

    共有4个站进行码分多址通信。4个站的码片序列为:a:(-1 -1 -1 +1 +1 -1 +1 +1) b:(-1 -1 +1 -1 +1 +1 +1 -1) c:(-1 +1 -1 +1 +1 +1 -1 -1) d:(-1 +1 -1 -1 -1 -1 +1 -1) 现收到这样的码片序列:(-1 +1 -3 +1 -1 -3 +1 +1),则( )发送1。

  • 2022-06-09 问题

    共有四个站进行CDMA通信,现收到这样的码片序列(-3 +1 -1 -1 +1 +1 +1 -3),则下列站点发送了数据1的是( ) A: (-1 -1 -1 +1 +1 -1 +1 +1) B: (-1 -1 +1 -1 +1 +1 +1 -1) C: (-1 +1 -1 +1 +1 +1 -1 -1) D: (-1 +1 -1 -1 -1 -1 +1 -1)

    共有四个站进行CDMA通信,现收到这样的码片序列(-3 +1 -1 -1 +1 +1 +1 -3),则下列站点发送了数据1的是( ) A: (-1 -1 -1 +1 +1 -1 +1 +1) B: (-1 -1 +1 -1 +1 +1 +1 -1) C: (-1 +1 -1 +1 +1 +1 -1 -1) D: (-1 +1 -1 -1 -1 -1 +1 -1)

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