• 2022-06-12 问题

    在判断DJ动作的原因时,WHK1在“+”位时,DJ不再动作,将WHK1置“-”位时,DJ又动作,为主回路直流()端接地。

    在判断DJ动作的原因时,WHK1在“+”位时,DJ不再动作,将WHK1置“-”位时,DJ又动作,为主回路直流()端接地。

  • 2022-05-29 问题

    万能转换开关的代号是()。 A: WNK B: WHK C: WNHK D: WNJK

    万能转换开关的代号是()。 A: WNK B: WHK C: WNHK D: WNJK

  • 2022-06-12 问题

    DJ动作后,将WHK1置“+”位,DJ不再动作,将WHK1置“-”位,DJ又动作的原因为()。 A: 主回路直流正端接地 B: 主回路直流负端接地 C: 主回路交流端接地

    DJ动作后,将WHK1置“+”位,DJ不再动作,将WHK1置“-”位,DJ又动作的原因为()。 A: 主回路直流正端接地 B: 主回路直流负端接地 C: 主回路交流端接地

  • 2022-05-30 问题

    某乙烯和足枯的氢气的混合气体的总压为 [tex=3.214x1.0]LtoINdzee3DiEQ6CSzc9Sw9+8kQlpmEc5E7vXdAFaQA=[/tex], 在锦催化剂催化下发生如下反应:[p=align:center][tex=9.571x1.357]TbxyAy5lC+CqL28X0u8u89CQwA32A7RAW0WqhAAWqA/+jyveeRoXjJFqecjXBWzndMPnvK4gDXRHWmL9Wh9rhNRuykMInicqWhodOg2pBgDAtkDStdnAvx/d47ZDGcntSReckFo2kJXRf1hYDwdT3g==[/tex]反应结束时温度降至原温度后测得总压为 [tex=3.214x1.0]6pBJqqe2hgiEco0pdtaVZR1CiU/yQ8O7nXZsVeo/WHk=[/tex]。 求原混合气体中乙烯得摩尔分数。 

    某乙烯和足枯的氢气的混合气体的总压为 [tex=3.214x1.0]LtoINdzee3DiEQ6CSzc9Sw9+8kQlpmEc5E7vXdAFaQA=[/tex], 在锦催化剂催化下发生如下反应:[p=align:center][tex=9.571x1.357]TbxyAy5lC+CqL28X0u8u89CQwA32A7RAW0WqhAAWqA/+jyveeRoXjJFqecjXBWzndMPnvK4gDXRHWmL9Wh9rhNRuykMInicqWhodOg2pBgDAtkDStdnAvx/d47ZDGcntSReckFo2kJXRf1hYDwdT3g==[/tex]反应结束时温度降至原温度后测得总压为 [tex=3.214x1.0]6pBJqqe2hgiEco0pdtaVZR1CiU/yQ8O7nXZsVeo/WHk=[/tex]。 求原混合气体中乙烯得摩尔分数。 

  • 2022-06-07 问题

    以下为可控硅励磁装置开机操作程序中的其中四项,排在第一项的操作是() A: 将转换开关WHK 置“调试”位,冷却风机工作 B: 手调调节旋钮,在最小至最大范围内调节应平滑稳定 C: 按一下投励按钮,检查励磁电流、电压等 D: 合装置空气开关

    以下为可控硅励磁装置开机操作程序中的其中四项,排在第一项的操作是() A: 将转换开关WHK 置“调试”位,冷却风机工作 B: 手调调节旋钮,在最小至最大范围内调节应平滑稳定 C: 按一下投励按钮,检查励磁电流、电压等 D: 合装置空气开关

  • 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

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