1, and several examples of equal scale are used to find the scaling target. The problem of less than constant is the key point, because it involves a test site, which is the limit of the first n terms in the geometric series with the common ratio less than 1.

2.(n*n type, N * (N- 1), N * (N+ 1), N * (N-2), N * (N+2) type) fracture scaling method.

The college entrance examination only needs to be repeated, once is not enough, and twice will definitely cost you, unless you are lucky and just practice.

Yes. But the exam should not be aimless. The setting of the college entrance examination questions must be designed to test a certain test center, which shows that this test center is not the limit of equivalence.

Generally speaking, the sub-topic method is not a regular test site for the college entrance examination. Unless the questioner gives a question, there are not many separate investigations.

3. After modification, the monotonicity of the constructor is used to maximize the bridge scaling, which is a popular scaling method (because the derivative is high in middle school now).

4. Double digestion (not commonly used).