皮皮学，免费搜题
登录
搜题
【单选题】
辐射(radiation)是指任何源的能量流以无线电波的形式向外发出。正确的说法是:A.
闪电产生的电磁波干扰是一种辐射
B.
沿电源线窜入接收机的差模干扰是一种辐射
C.
射频电路中变压器内磁芯里的磁场是一种辐射
D.
射频电路中电容器内极板间的电场是一种辐射
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】When did it rain last time in Juárez? A. Three days ago B. A month ago C. A year ago.
【单选题】When did the woman visit France?
A.
Last month.
B.
Three months ago.
C.
Six months ago.
D.
Last year.
【简答题】Alex was a giraffe who lived in a zoo with his mum, dad and other giraffe friends. As Alex grew, he 1 his neck was much shorter than the others’. He began to get 2 . But his mother told him that he wa...
【简答题】Robert Edwards was blinded in a traffic accident. He was also a little deaf 1 old age. Last week, he was taking a walk near his home when a thunderstorm came. He hid 2 the storm under a big tree and w...
【单选题】— When did the twins go to the aquarium? — _______. [ ]
A.
Three days ago.
B.
Next month.
C.
For four days.
相关题目：
参考解析：
知识点：
题目纠错 0
发布
