The inscription is about the topic, and the following is an explanation.

I don't like it, because it looks uncomfortable and the quality of the questions is mixed.

Longmen and 5.3?

If it is good knowledge in different disciplines, it is very clear, but it is not suitable for time.

In addition, sometimes the topic is too biased, so you should make a good choice.

5.3, the topic is relatively new, but there is also a defect that there are too few empty places.

I think version B is good, and version A is costly and thankless. Because the answers to the exercises are very detailed. Summary of scientific knowledge is not very important ~ ~