在传播模型中计算路径损耗时,需要确定()
A.频率
B.距离
C.基站天线、移动台有效高度
D.环境校正因子
参考答案:A, B, C, D
I would love _______ to the party last night but I had to work extra hours to finish a report.
A.to go
B.to have gone
C.going
D.having gone
Boys and girls, the books in the library should______ good care of.
A. take B. are taking C. be taken