TPO44托福聽力真題解析：Lecture 4

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TPO44托福聽力解析：Lecture 4

 1. What is the main purpose of the talk?

A. To explain the mechanical functioning of barrages.
B. To discuss some possible ecological effects of building barrages.
C. To discuss the effects of ocean tides on coastal ecosystems.
D. To describe ways to increase biological productivity of estuaries.

解析：教授一直在討論建造攔河壩對生態(tài)的影響。選B

2. What is the professor's opinion when the man expresses concern about marine life on the mud flats?

A. She thinks the environmental impact of barrages would be worse for birds than for fish.
B. She agrees that any damage to the mud flats would probably be irreversible.
C. She feels that the situation is more complex than the man realizes.
D.  She does not believe that the mud flats support a wide variety of animal species.

解析：學(xué)生問mud flat上面的生物會怎樣被barrage影響，教授回答說你是不是覺得那些生物會受不良影響？考慮一下以下因素：通常河底的沉積物都會被潮汐造成的亂流攪動，造成水比較渾濁，而建造了攔河壩以后潮汐亂流不會攪動起沉積物，陽光可以照射進(jìn)去，導(dǎo)致更多的食物可以被產(chǎn)生，吸引來其他生物。即實(shí)際情況不想學(xué)生想得那么簡單，選C。

3. The professor mentions a change in the quantity of fish caught near a barrage in France. What most likely happened to the water in the estuary as a result of the construction of the barrage?

A. The water has become clearer.
B. The water has become saltier.
C. The water has become polluted
D. The water level has risen.

解析：同上解析，答案A。

4. What does the professor say is a criticism of the proposed barrage at the Severn River in Great Britain?

A. It would damage nearby buildings.
B. It would attract harmful species to the region.
C. It would not be as large as the barrage in France.
D. it would be too expensive to build.

解析：選D

5. Why does the professor say this:

A. To request that the student answer in greater detail.
B. To introduce a new topic for discussion.
C. To make the student's statement more accurate.
D. To repeat a point that she had not stated clearly.

解析：選C

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