加窗频谱函数能够分析的最低频率为多少？ A: 1/Tw B: 2/Tw C: 3/Tw D: 4/Tw

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2022-06-26 问题

加窗频谱函数能够分析的最低频率为多少？ A: 1/Tw B: 2/Tw C: 3/Tw D: 4/Tw

2022-06-09 问题

根据乘方的意义可知：53=5×5×5，54=5×5×5×5，则53×54=（5×5×5）×（5×5×5×5）=57即53×54=57。想一想：

2022-07-27 问题

单稳态触发器输出脉冲宽度 tW 即为暂稳态维持时间，主要取决于充放电元件 R、C，tW=（） A: tW»1.1RC B: tW»0.9RC C: tW»0.45RC D: tW»2RC

2022-06-30 问题

由555定时器构成的单稳态触发器，其输出脉冲宽度TW为（）。 A: TW=1.1RC B: TW=0.9RC C: TW=1.3RC D: TW=1.5RC

2022-06-04 问题

把1～54这54个数从小到大排成一行（如表），

2022-05-29 问题

下列程序的运行结果是（）。t = 0 while t < 5: print(t, " is less than 5") t = t + 1else: print(t, " is not less than 5") A: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 55 is not less than 5 B: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 55 is not less than 5 C: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 5 D: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 5

下列程序的运行结果是（）。t = 0 while t < 5: print(t, " is less than 5") t = t + 1else: print(t, " is not less than 5") A: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 55 is not less than 5 B: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 55 is not less than 5 C: 0 is less than 51 is less than 52 is less than 53 is less than 54 is less than 5 D: 1 is less than 52 is less than 53 is less than 54 is less than 55 is less than 5

2022-07-24 问题