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The seventh grade first volume mathematics midterm examination questions.
The midterm questions in the first volume of seventh grade mathematics are as follows:

First, multiple-choice questions.

On the number axis, the number represented by the point from the origin 3 is ().

A.-3,B. 3,C. -2,D. 2 .

Point m is the point on the number axis that represents -2. If the point m is translated 5 units to the right along the number axis to the point n, the number represented by the point n is ().

A.-7,B- 3,C. 3,D. 7 .

If a+b > 0 and ab < 0, then ().

A.a>0,b>0,B. a