look at a book 和read a book有什么区别？

Question

我们平常说的I was resding a book.

If you memorize a poem,you can say it without looking at a book.

Answer 1

look at是看着
read是阅读

前者是看着，不一定阅读上面的文字，进脑子
后者是着重阅读

Answer 2

一个是读书，用心，另一个是指看一看，看着。。