更改下列哪些参数后需要重新进行仿真路损预测（）。
A、天线的方位角、下倾角
B、传播模型
C、建筑物的穿透损耗
D、导频强度
参考答案：A, B
He died in 1870 and his tomb reads, ‘________ his death, one of the England’s greatest writers _________ to the world.’
A．At; is lost in
B．By; is lost to
C．For; is a loss to
D．As; gets lost to
当状态信息溢出需翻页时:（）
A、按下CANCEL键
B、按下STATUS键
C、按下维护面板上的ECS/MSG键
D、按下维护面板上的ERASE键
