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20 10 several topics of Jiangsu mathematics college entrance examination!
The last question is not allowed to be derived, and it is the largest in one third of the time.

The penultimate problem can be solved by assignment, which is very simple and must be completed within 2 minutes.

Let me tell you the third question from the bottom. I guessed the answer was Y= 1 directly during the exam, so I made the answer quickly. ...

The fourth question is road speed, you draw pictures, numbers and shapes.

The fifth from the bottom is pure calculation. Do it yourself slowly ~ ~ ~