Lecture 1
1. What is the main purpose of the lecture? 【内容主旨题】
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.
答案：A
破题关键词汇：
解析：(从20秒开始，原文重现：So, I want to talk about how nanotechnology is being used today. And just to give you an idea, we’ll look at one particular application.)
教授提到要探讨纳米技术如今是如何被运用的，并通过一个特别的运用来了解。
选项A的an example of a practical use与原文意思一致，通过例子来解释纳米技术的运用，故选项正确; B未提及纳米技术的起源origins; C的a brief outline一个简短的概述在原文中未被提及;D的growing interest逐渐增长的兴趣在原文中也未被提及。
2. How does the professor organize the information he presents to the class? 【组织结构题】
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.
答案：D
破题关键词汇：
解析：(从54秒开始，原文重现：Now, fogging often occurs when a cold surface comes into contact with warm moist air, such as when a glass shower door or mirror fogs up during a warm shower.
Now, what's actually happening is, what the fog is, is thousands of tiny spherical water droplets condensing on the surface of the glass. Light hits the water droplets and is scattered in random directions, causing the fogging effect.
Now, the kind of spray-on treatments I mentioned. Well, they wear off. What happens is they cause the tiny water droplets to flatten when they condense on the surface of the shower door or bathroom mirror or whatever object it is, it's been applied to.)
教授讲了雾化发生的条件并解释了什么是雾化，并提出了防止雾化的方法。
选项A中纳米涂层的启发未被提及;选项B纳米涂层是如何被推广的在原文中并未被提及;选项C前半句的雾化是怎么形成的和原文结构一致，后半句讲的纳米技术的基本概念并未被提及;选项D教授解释了雾化是如何发生的接着讲了纳米涂层是如何防止它的，与原文的结构一致，选项正确。
3. According to the professor, how does the new nanocoating work? 【细节题】
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.
答案：C
破题关键词汇：new nanocoating
解析：(从2:34秒开始，原文重现：The coating prevents fog from developing, because it loves water. It attracts the water droplets, sucking them into the tiny pores. And that alters the shape of the droplets. The droplets are forced to flatten and to join together into a single sheet of water, rather than remaining as single droplets, each of which is a sphere that scatters light in different directions.)
原文里教授讲涂层是如何防止雾化发展的。选项A的light在原文的细节中并未被提及;选项B的迫使水滴从极薄的表面滚落，原文的细节是水滴被压平并聚集成一片水，选项错误;选项C使水滴聚集成一片独立的水，与原文细节一致;选项D中提到light随机散射在不同的方向，选项错误。
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