The difficulty is low, suitable for students who have just learned the triangle part to practice.

Not challenging, not meaningful.

You can practice 2, 3 and 4.

It is comprehensive and can achieve the effect of learning while practicing (because there are many contents involved), but some problems of analytic geometry need to be supplemented.

If you are strong, you can challenge 5 6. Pay attention to the answer No, it's okay.

It is important to absorb the solution to the problem. Perseverance will make a big breakthrough.

So it is not recommended to do the first big question.