很多学生认为学习数学就是要做很多的试题。当然,不可否认,学习数学必须要做试题。但是,数学向来有题海、题库,好像永远都做不完。其实不然,在这样的数学题库中也是有主线的,由主线上的各个点向外发散,就可形成一个立体的网络,我们所谓的题库就这样产生了。那么如何由这个点向外发散呢? Many students think learning mathematics is to do a lot of questions. Of course, it is undeniable that learning mathematics must be done. However, mathematics has always had the title of the sea, the question bank, seems to never be done. In actual fact, in such a maths question bank is also the main line, divergent from the various points on the main line, you can form a three-dimensional network, so-called questions bank so produced. So how to diverge from this point?