单选题If the power is 0 dBm, what is the power in mW?（）A0mWB1mWC10mWD1.5mW
单选题
If the power is 0 dBm, what is the power in mW?（）
A
0mW
B
1mW
C
10mW
D
1.5mW
参考解析
解析：
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请将下面程序补充完整。public class PowerCalc{public static void main(String[]args){double x=5.0;System. out. println(x+"to the power 4 is"+power(x, 4));System. out. println("7. 5 to the power 5 is"+power(7.5, 5));System. out. println("7.5 to the power 0 is"+power(7.5, 0));System. out. println("10 to the power -2 is"+power(10, -2));}static double【 】 (double x, int n){if(n＞1)return x * power(x, n-1);else if(n＜0)return 1.0/power(x, -n);elsereturn n==0 ? 1.0:x;}}
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