妇科医生可以利用超声波检查胎儿是否正常,这说明声波能够传递______.
声音可以传递信息、传递能量;妇科医生可以利用超声波检查胎儿是否正常,是从声音中获取信息.
故答案为:信息.
She speaks English an American, so we all believe that she has stayed in America for many years.
A.as good as
B.as bad as
C.as badly as
D.as well as
二个10欧的电阻并联,再与一个5欧的电阻串联,总电阻值为10欧。