lots of spelling errors, did anyone proof this? also, i’m pretty sure all the graphics were originally color, but there are no color slides in the book so many of the graphs are difficult to interpret.the flow of the text is difficult to learn from; the go from basic concepts “what is ac? what is dc” to using many technical terms with out any explanation.the person or group who wrote this obviously had a wealth of knowledge; too bad they are poor communicators.
颜色不一致