1. I am not proficient in cs4. In fact, I am not very serious in class, but I can still read books. I remember taking a lot of classes like: Channels and Masks "Paths: Image Manipulation: Image Stroke etc.
2. The basics mastered in March are more than those in April. I will do my homework to the best of my ability next month.
3. In fact, I don't understand the ACCESS database, and I can't understand it all the time. The database you said is faster than cs4. Sometimes I don't understand at all, but I only understand a little bit of fur, which is not enough for me personally. This month, I have mastered the student management you talked about.