why DoEs thE spEAkEr sAy thAt rADiAtion is similAr to rADio wAvEs
A、BECAusE Both oF thEm CAn BE DEtECtED By humAn sEnsEs.
B、BECAusE Both oF thEm CAn BE sEnsED By A rADio rECEivEr.
C、BECAusE Both oF thEm ArE hArmFul.
D、BECAusE Both oF thEm CAn only BE DEtECtED By DEviCEs.