question 2\na straight edge is used to check the flatness of a surface.\nselect one:\n○true\n○false
question 2\na straight edge is used to check the flatness of a surface.\nselect one:\n○true\n○false
Answer
Answer:
A. True
Brief Explanations:
A straight - edge is a common tool for checking surface flatness. By placing it on the surface, gaps between the straight - edge and the surface indicate non - flatness.