【正确答案】 D

【答案解析】
[听力原文] 30-32
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 (30) . 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 18 ^th 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 (31) ; 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 your math test, you should remember that brain-exciting effects lust only 10 to 15 minutes (32) . Would rock music work as well as the piano music do? No, the scientists say. In fact, the less complex music might even interfere with the brains' reasoning ability.
30．What is this passage mainly about?
题目问短文的主要内容是什么。短文开头提到“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(你马上要参加数学考试吗?考试前可以听听古典钢琴曲，这样你可能会得高分) ”，可见这篇文章就是分析音乐对数学考试的影响。

【正确答案】 C

【答案解析】[听力原文] Why can classical music play a positive role in problem solving? 题目问为什么古典音乐对解决问题有积极的作用。通过短文中的“The music seems to excite nerve activities in the brain(音乐可以刺激大脑的神经活动) ”可知C) 正确。

【正确答案】 A

【答案解析】[听力原文] What is one of the findings of the research? 题目问这项研究还有什么发现。在短文中我们听到这句话“you should remember that brain-exciting effects last only 10 to 15 minutes(你要记得大脑兴奋的影响只能持续10～15分钟) ”，因此可以判断A) 为正确答案。