问题详情

Implied but not stated is that__________．
A.laser—doppler radar ismore accurate than microwave radar
B.microwave radar operatesat a higher frequency than laser—doppler radar
C.the light—beam radar canmeasure only slow speeds with accuracy
D.microwave radar may notensure absolute precision in measuring varying speeds请帮忙给出正确答案和分析，谢谢！