【简答题】【消耗次数:1】
Direction: Fill in the blanks with the words given below. Change the form if necessary.[chore; talent; crowded; earnings; finance; festive; memorable; sacrifice; smash; reproduction]3. He was satisfied with his[填空1]as an accountant.
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随机题目
【单选题】 交流电压的波形因素KF定义为____。?
①  峰值/平均值??
②  有效值/平均值?
③  峰值/有效值?
④  平均值/峰值?
【单选题】 交流电压的波峰因素Kp定义为____。
①  峰值/平均值
②  有效值/平均值
③  峰值/有效值
④  平均值/峰值
【单选题】 ______电压表的一个缺点是对信号波形的谐波失真所引起的波形误差非常敏感。
①  平均值
②  有效值
③  峰值
④  选频电平
【单选题】 电子电压表按其工作原理可分为______和_______。
①  模拟电压表、模拟电子表
②  模拟电子表、数字电子表
③  模拟电压表、数字电压表
④  数字电压表、数字电子表
【单选题】 下列类型的表中_____电压表有很高的灵敏度,频率范围也较宽。
①  检波—放大式
②  放大—检波式
③  调制式
④  外差式
【单选题】 用全波均值电压表测量某三角波信号,读数为10V,则该三角波的峰值电压为_________。
①  10V
②  9V
③  18V
④  14.13V
【单选题】 __________电压表的一个缺点是对信号波形的谐波失真所引起的波形误差非常敏感。
①  平均值
②  有效值
③  峰值
④  选频电平
【单选题】 数字式电压表根据其所用AD转换器,可分为_____和_____两类。?
①  速度型、积分型
②  频段型、测量型
③  积分型、非积分型
④  非积分型、测量型
【单选题】 以下不属于数字电压表相对于模拟电压表的优点的是_______。
①  准确度和分辨力高
②  测量频率范围宽
③  输入阻抗高
④  测量速度快
【单选题】 以下不属于积分式A/D转换器的优点的是_______。
①  抗串模干扰能力强
②  测量灵敏度高
③  对积分元件和时钟信号的稳定性和准确度要求低
④  测量速度快