Lecture-1
What does thhe professor mainly discuss?
A.Cause of soil diversity in old-growth forests
B.The results of a recent research study in a Michigan forest
C.The impact of pedodiversity on forest growth
D.How forest management affects soil diversity
答案：A
解析：Professor: But now I wanna discuss what is called pedodiversity......Ok. There were 3 different causes of pedodiversity.
剩下的部分教授讲的就是3个causes，也就是lecture的主要内容。
According to the professor, in what way is the soil in forested areas generally different from soil in other areas?
A.In forested areas, the soil tends to be wamer and moister.
B.In forested areas, the chemistry of the soil changes more rapidly.
C.In forested areas, there is usually more variability in soil types.
D.In forested areas, there is generally more acid in the soil.
答案：C
解析： A lot of different types of trees in an area might mean more pedodiversity.
也就是在森林里有more pedodiversity。
What does the professor suggest are the three main causes of pedodiversity in the old-growth hardwood forests she discusses?Click on 3 answers.
A.The uprooting of trees
B.The existence of gaps
C.Current forest-management practices
D.Diversity of tree species
E.Changes in climatic conditions
答案：ABD
解析：听三个主旨句，第一个是 species。第二个是 another cause?后面的gaps。第三个是 Okay， and the third cause后面的 uprooting of trees。
Why does the professer mention radiation from the Sun?
A.To point out why pits and mounds have soil with unusual properties
B.To indicate the reason some tree species thrive in Michigan while others do not
C.To give an example of a factor that cannot be reproduced in forest management
D.To help explain the effects of forest gaps on soil
答案：D
解析：For instance, without a tree to absorb radiation from the sun, tool for shade, the full intensity of that radiation reaches the ground. The soil where the tree used to be heats up. And without a tree to soak up moisture from the ground, the soil remains wetter than in the surrounding forest. With a high temperature and more moist conditions, the process of organic matter decompositions beats up.
这些话是在解释gap的作用。
Why does the professor consider pedodiversity an important field of research?
A.It has challenged fundamental ideas about plant ecology.
B.It has led to significant discoveries in other fields.
C.It has implications for forest management.
D.It is an area of study that is often misunderstood.
答案：C
解析： And when we better understand pedodiversity, we will be better able to predict the impact of forest management on soil.
Why does the professor give the students an article to read?
A.To help them understand the relationship between forest dynamics and pedodiversity
B.To help them understand how to approach an assignment
C.To provide them with more information on pits and mounds
D.To provide them with more exposure to a controversial aspect of pedodiversity
答案：A
解析：I want you to read it because it makes the point I only touched on..........As the article explains, forest dynamics affects pedodiversity.
也就是关于forest dynamics与 pedodiversity的关系。
Lecture-2
What is the main purpose of the lecture?
A.To explain how musicians can perform successfully in theaters and concert halls with poor acoustics
B.To explain how the design of theaters and concert halls has changed over time
C.To discuss design factors that affect sound in a room
D.To discuss a method to measure the reverberation time of a room
答案：C
解析：Today I want to talk a bit about the relationship between the built world and the sound.
从主旨句中看出是建筑与声音的关系，只有C项符合。
According to the lecture, what were Sabine's contributions to architectural acoustics? Click on 2 answers.
A.He founded the field of architectural acoustics.
B.He developed an important formula for measuring a room's reverberation time.
C.He renewed architects' interest in ancient theaters.
D.He provided support for using established architectural principles in the design of concert halls.
答案：AB
解析：But not until the beginning of the 20th century the architectural acoustics became a became a scientific field. That was when the physicist Sabine started to do extensive studys on reverberation. 暗示Sabine是 AC学科的创建者。对应A
Sabine recognised this and he came up with an equation to measure a room's reverberation time. 对应选项B
According to the professor, what is likely to happen if a room has a very long reverberation time?
A.Performers will have to make an effort to be louder.
B.Sound will not be scattered in all directions.
C.Older sounds will interfere with the perception of new sounds.
D.Only people in the center of the room will be able to hear clearly.
答案：C
解析： Professor:So what happens if a room's reverberation time is very long?
Girl: Would it be difficult to hear new sounds if we can still hear the old songs?
Professor: Exactly!
女生的话正确，即为答案。注意学生与教授的对话会作为考点出现。
Why does the professor mention a piano recital? Click on 2 answers.
A.To illustrate that different kinds of performances require rooms with different reverberation times
B.To demonstrate that the size of the instrument can affect its acoustic properties
C.To cite a type of performance suitable for rectangular concert hall
D.To exemplify that the reverberation time of a room is related to its size
答案：AD
解析：A single instrument, something like a piano recital, a room with a short reverberation time is better.So for a solo piano, a small room works well.
说明房间的size与reverberation time有关系，而better这种比较则说明不同乐器需要不同的room size。
According to the professor, what purpose do wall decorations in older concert halls serve?
A.They make sound in the hall reverberate longer.
B.They distribute the sound more evenly in the hall.
C.They make large halls look smaller and more intimate.
D.They distuise structural changes made to improve sound quality.
答案：B
解析：So what can be done to distribute the sounds evenly?.....But they all have some decorations on the wall....which distributed the sound very efficiently. 说明这些装饰就是用来分散声音的。
Why does the professor say this: 重听题
A.To find out if students have understood his point
B.To indicate that he will conclude the lecture soon
C.To introduce a factor contradicting his previous statement
D.To add emphasis to his previous statement
答案：D
解析： There are something can be control by architects.
演讲的内容就是关于如何用建筑结构控制声音的反射，所以教授是在强调演讲主题。
这道题目如果把can听成can't， 就一定会选C而做错。
以上就是小编为同学们整理的TPO29听力答案及解析,托福备考的过程旅程是比较艰辛的，大家一定要平时多加练习，小编会每天为托福考生更新最新消息，关注相信你们每天都会收获的更多!