A、 To explain how angles are measured.
B、 To prove that Mesopotamiansdid not know how to use square numbers.
C、 To discuss a mistaken historical interpretation.
D、 To explain why tablets are reliable historical records.

【正确答案】 C

【答案解析】解析：What is the main purpose of the talk?

A、 They did not use square numbers.
B、 They used complex measuring instruments.
C、 They recorded math exercises on tablets.
D、 They calculated the length of triangle sides.

【正确答案】 D

【答案解析】解析：According to the professor, what did some historians mistakenly assumed about the Mesopotamians?

A、 Pictures of triangles.
B、 Calculations using square numbers.
C、 Measurements of angles.
D、 Greek symbols.

【正确答案】 B

【答案解析】解析：What was on the Mesopotamian tablet mentioned in the talk?

A、 They taught the Mesopotamians about square numbers.
B、 They were less advanced in mathematics than the Mesopotamians.
C、 They did not use square numbers.
D、 They knew how to measure angles.

【正确答案】 D

【答案解析】解析：What does the professor imply about the ancient Greeks?