在以下GSM防止干扰的技术中,在GSM-R建议不使用的是()
A、DTX
B、功控
C、同心圆
D、跳频
参考答案:A, B, C
She will tell us why she feels so strong that each of us has a role________in making the earth a better place to live in.
A.to have played
B.to play
C.to be played
D.to be playing
若执行下面的程序时,从键盘上输入5和2,则输出结果是 #include<iostream.h>: void main( ) inta,b,k; cin > > a > > b; k=a; if(a < B) k=a%b; else k=b% a; cout < < k < < end1;
A.5
B.3
C.2
D.0