Peak-peak voltage is twice the peak voltage (amplitude).
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The effective value of AC is the value of alternating voltage or current that will have the same effect on a resistance as a comparable value of direct voltage or current will have on the same resistance.
A. 对
B. 错
布尔运算表达式10 and ''的值为:
A. ''(空字符串)
B. 10
C. True
D. False
布尔运算表达式'' or 10的值为:
A. ''(空字符串)
B. 10
C. True
D. False
range(5)可以得到整数数列为:
A. 1,2,3,4,5
B. 0,1,2,3,4,5
C. 0,1,2,3,4
D. 5