下面属基带中继的微波中继方式是()
A、射频转接
B、中频转接
C、再生中继
参考答案:C
The sick woman herself walked to the hospital ______ a stick ______ her hand. [ ]
A. with; on
B. have; in
C. has; in
D. with; in
什么是相关一回归分析预测法?它依据什么预测原理?