托福（听力）模拟试卷12
听力组题
What are the speakers mainly discussing?
1.(A,B)
A. Psychology
B. Health sciences
C. Astronomy
D. Biology
解析：题目询问学生最感兴趣的领域，注意本题有两个答案。当男士问女士最初感兴趣的领域（What field of study did you initially take interest in？）时，女士回答自己最开始想学psychology，接着又提及自己对public health，astronomy和ancient art history都感兴趣。随后，女士提及想将health sciences和psychology一起学的想法，还说自己在学习这两门课时才真正感觉自己在学习（That’s the only time I truly feel like I’m learning）。而在对话的后半部分，男士再次问及女士对health sciences和psychology感兴趣多久了，女士则回答说她已经考虑了很长一段时间（I’ve been thinking about both for a long time）。从这些表述都可判断，女士最感兴趣的两个领域应该是health sciences和psychology，即A、B项。
2.(C)
A. He wants the student to be more conservative about picking a major.
B. He does not understand why she wants to do a double major.
C. He thinks that the combination of the two would be helpful.
D. He does not think the student is doing enough to narrow her choices.
解析：本题重听的部分是\\
3.(A)
A. He does not think it will hold her interest for long.
B. He does not think it is a genuine interest.
C. He thinks it is a better fit for the student.
D. He thinks she has found her true passion.
解析：题目询问男士对该学生感兴趣的艺术史所持的态度。当学生提及她对艺术史感兴趣时，男士问了一个问题：\\
4.(A)
A. Do a double major in psychology and health
B. Stay with her current major
C. Change her major to art history
D. Consider her options longer
解析：题目询问学生接下来可能会做什么。在对话的最后该学生明确提及会选择两个专业一起学（I guess I will do both health and psychology），故A项“修心理学和健康科学双专业”正确。
How does the field of physics define \\
5.(B)
A. To give reasons for the failure of agriculture in some areas
B. To explain what happens when a moving object meets resistance
C. To describe recent improvements in agricultural technology
D. To show that a plow is the least efficient piece of farm equipment
解析：本题重听的内容是\\
6.(B)
A. If a machine slows an object, energy will be conserved.
B. Energy can change forms, but it cannot disappear.
C. Nuclear energy must be regulated by international law.
D. The amount of energy in a system tends to increase over time.
解析：题目询问最能反映热力学第一定律的表述。在提到能量守恒（热力学第一定律）时，教授说能量可以从任何一种形式转化为任何一种形式（energy can be converted from any form to any other form），但无论采取什么形式，它仍然是能量，而且当它改变形式时，能量不会消失（none of the energy disappears）。故B项是热力学第一定律最佳诠释。
7.(A,C)
A. An electric stove converts electricity to heat energy.
B. A tractor engine stops when the fuel tank is empty.
C. A car changes the chemical energy in gasoline to motion.
D. A light bulb burns out after being on for one hundred hours.
解析：题目询问描述能量从一种形式到另一种形式的转换的两个选项。教授讲完能量守恒的概念后，举出了两个例子：汽车将汽油中的化学能转化为动能；炉子把电能或化学能转化为热能来烹饪食物，这与A项和C项的表述相呼应。B项和D项的表述都与能量从一种形式到另一种形式无关。
8.(D)
A. To support the idea of giving food aid to needy people
B. To recommend the development of new energy sources
C. To explain why organisms must create their own energy
D. To show that both machines and living things need energy
解析：本题重听的内容是\\
9.(D)
A. The system gradually gains energy in the form of heat.
B. If there is no sunlight, the earth makes its own energy.
C. Plants contribute more energy than animals contribute.
D. No new energy is created, and no energy is destroyed.
解析：题目询问作为一个整体系统的地球的能量
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