asm manual中经常可以看到一些作者预测的话  比如说  I expect very few questions in this lesson或者 exam in early 2000 used to have questions in this lesson, but I do not expect that they still ask them. 这样的话出现  是不是就可以放心的skip了？ 因为asm 的manual本来就够多够全的了  是不是跳过这些对考试影响不大？