TPO44托福聽力真題解析：Lecture 1

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TPO44托福聽力解析：Lecture 1

 1. What is the main purpose of the lecture?

A. To provide an example of a practical use of nanotechnology.
B. To show the origins of the field of nanotechnology.
C. To give a brief outline of the main concepts of nanotechnology.
D. To explain the growing interest in nanotechnology research.

解析：教授開頭即說了今天主要一種納米技術(shù)的應(yīng)用，后文也是關(guān)于該納米涂層技術(shù)的，選A。

2. How does the professor organize the information he presents to the class?

A. He describes the inspiration behind the nanocoating, then how the coating works.
B. He describes how the nanocoating is currently marketed, then the inspiration behind it.
C. He explains how fogging occurs, then the basic concepts of nanotechnology.
D. He explains how fogging occurs, then how the nanocoating prevents it.

解析：教授先解釋了霧的形成機制，再描述了為什么改涂層能防霧，選D。其它選項沒說

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3. According to the professor, how does the new nanocoating work?

A. By forcing light to bounce off a glass-coated polymer.
B. By forcing water droplets to roll off an ultrathin surface.
C. By causing water droplets to merge into a single sheet of water.
D. By causing light to scatter randomly in many directions.

解析：教授講明了該硅離子-聚合物的結(jié)構(gòu)有很多像口袋一樣的孔洞，能將水滴吸平形成薄片狀的水而不是水滴，選C。

4. According to the information in the lecture, why does the new nanocoating not last as long on plastic as it does on glass?

A. Plastic cannot withstand extremely high temperatures.
B. The internal structure of plastic repels a positively charged polymer.
C. The coating solution scatters when it comes into contact with plastic.
D. Plastic surfaces scratch more easily than glass surfaces do.

解析：教授講明了玻璃材質(zhì)跟塑料的區(qū)別就是玻璃耐高溫，塑料不行，選A。

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5. What inspired the team of scientists in developing the new coating?

A.  A problem the team frequently encountered in everyday life.
B. The ineffectiveness of spray solutions in flattening water droplets.
C. The leaves of a plant that the team had been investigating.
D. Interactions observed between silica nanoparticles and polymers.

解析：選C

6. What is the professor's opinion about the approach inventors took to the development of the new nanocoating?

A. He thinks other inventors should use a similar approach.
B. He is impressed by the flexibility of their approach.
C. He is surprised the research process took so long.
D. He thinks they should have spent more time testing a super hydrophobic coating.

解析：選B

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