问题
名词解释
电磁辐射
答案
参考答案:
电磁辐射是指以电磁波形式通过空间传播的能量流,且限于非电离辐射,包括信息传递中的电磁波,发射、工业、科学、医疗应用中的电磁辐射,高压送变电中产生的电磁辐射。
电磁辐射
参考答案:
电磁辐射是指以电磁波形式通过空间传播的能量流,且限于非电离辐射,包括信息传递中的电磁波,发射、工业、科学、医疗应用中的电磁辐射,高压送变电中产生的电磁辐射。
仿照所给短文从不同几个方面向同学介绍一下Peter 的学习情况。 | |
at 1 . His math teacher said he was a 2 student and his English teacher said he could speak English 3 . However, his history teacher said he could 4 . Another disappointing result was in music. His music teacher said he 5 . | |
1._____2._____3._____4._____5._____ |