Dear, the topics in the newspaper are basically found by teachers, some are original, some are just changed numbers or conditions, and some may be original.

I really can't see other issues clearly.

This is the last question for you.

18. Solution:

(1)CD is parallel to the X axis, then the ordinate of point C is equal to d, that is, n=5.

(2) If (2)CD is parallel to the Y axis, the abscissa of point C is equal to d, that is, m- 1=3 and m=4.

To sum up, m=4 and n=5.

I wish you progress in your study! ! !

Hope to adopt thank you! ! !