已知信号 [tex=12.714x1.357]k+t9kPRBMzqPZr7eeHm9dM1rGIF+LrAD5NN7/WENon66p9S953fStx++k5ydAlLs[/tex]抽样频率[tex=4.786x1.214]4us1vd7lNoNUCPK/ZatxHyxwhMjyfBkt7w+QI6BqBKU=[/tex]求抽样信号 [tex=2.071x1.357]JaEAlhHisIlXPmHVu0axqw==[/tex]的频谱
举一反三
- 【单选题】下面程序段的输出结果是 () 。 int k,a[3][3]={1,2,3,4,5,6,7,8,9}; for (k=0;k<3;k++) printf(“%d”,a[k][2-k]); ( A ) 3 5 7 ( B ) 3 6 9 ( C ) 1 5 9 ( D ) 1 4 7 A. 3 5 7 B. 3 6 9 C. 1 5 9 D. ( A ) 1 4 7
- 已知信号x(t)的频谱带限于1000Hz,现对信号x(3t)进行抽样,求使x(3t)不失真的最小抽样频率为 未知类型:{'options': ['1000Hz', '[tex=3.571x2.0]fAmxKbK2h3aZQwpD8q0N1Lm/RUMIe2aQZMQ0vX1/FeM=[/tex]', '2000Hz', '6000Hz'], 'type': 102}
- set1 = {x for x in range(10) if x%2!=0} print(set1) 以上代码的运行结果为? A: {1, 3, 5, 7, 9} B: {1, 3, 5, 7} C: {3, 5, 7, 9} D: {3, 5, 7}
- set1 = {x for x in range(10) if x%2!=0} set1.remove(1) print(set1) 以上代码的运行结果为? A: {1, 3, 5, 7, 9} B: {1, 3, 5, 7} C: {3, 5, 7, 9} D: {3, 5, 7}
- set1 = {x for x in range(10)} print(set1) 以上代码的运行结果为? A: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9} B: {0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10} C: {1, 2, 3, 4, 5, 6, 7, 8, 9} D: {1, 2, 3, 4, 5, 6, 7, 8, 9,10}