This brief book is aimed at high school students, but speaks to anyone learning at any stage of life. Its formal, serious style closely matches its content, a school-masterly book on schooling. The author, W. H. Armstrong, starts with the basics: reading and writing. In his opinion, reading doesn’t just mean recognizing each word on the page; it means taking in the information, digesting it and incorporating it into oneself just as one digests a sandwich and makes it a part of him. The goal is to bring the information back to life, not just to treat it as dead facts on paper fr以下关于波与相对论的说法,正确的是( )
A.无论什么波,只要振幅足够大就可以产生明显的衍射现象
B.根据麦克斯韦的电磁场理论,变化的电场周围一定可以产生电磁波
C.波源与观察者互相靠近或者互相远离时,观察者接收到的频率都会发生变化
D.火车以接近光速行驶时,我们在地面上测得车厢前后距离变小了,而车厢的高度没有变化