单选题 A. How to improve your reasoning ability.
B. Why classical music is popular with math students.
C. The difference between classical music and rock music.
D. The effects of music on the results of math tests.

【正确答案】 D

【答案解析】[听力原文]
Do you have a tough math test coming up? Then listen to some classical piano music just before the test. You might end up with a higher score. Researchers at a university in California conducted an experiment. They asked a group of college students to listen to some piano music by a famous 18th century composer before taking a math test. They were surprised to find that the students' scores jumped 8 to 9 points. The music seems to excite nerve activities in the brain, similar to the activity that occurs when a person is figuring out a math problem. However, the scientists warn that before you get too excited about applying this method to you math test, you should remember that brain exciting effects last only 10 to 15 minutes. Would rock music work as well as the piano music did? No. The scientists say. In fact, the less complex music might even interfere with the brain's reasoning ability.

What is the topic of the speech?

【正确答案】 C

【答案解析】[听力原文]
Why classical piano music helps a tough math test?

单选题 A. The effects of music do not last long.
B. Piano music could interfere with your reasoning ability.
C. Music, whether classical or rock, helps improve your memory.
D. The more you listen to music, the higher your test scores will be.