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What is the difference between connecting two points AB and connecting AB in mathematics?
"Connecting" means connecting two points with a straight line segment or a curved line segment.

"Link" means connecting two points with a straight line.

Special attention should be paid to the difference between the two in drawing, which sometimes affects the expression of the meaning of the problem and even the problem.

Accuracy.

Generally speaking, "link" is used when drawing in junior and senior high schools.