Day6-Lecture1

Step1：听文章音频，计时3分30秒做题。（20分以下的同学可以尝试记一些笔记了，还是建议少写，在不耽误听的情况下写一些就好。）

题目：

1.What aspect of self-healing plastics does the professor mainly discuss?

A. The failed experiment that led to their development.

B. Industries that have the most immediate need for them.

C. Different approaches to designing them

D. Possible uses for them in biological healing.

2.According to the professor what happens during the actuation phase of the healing process?

A. A scar appears over an injury.

B. Platelets are delivered to an injury.

C. The system recognizes that it has been injured.

D. Chemicals mix and react with each other.

3.What is a limitation of using tiny round capsules to create self-healing plastics?

A. The capsules can heal plastic only once in the same location.

B. The capsules can damage the plastic when they break open.

C. The capsules may dissolve before they are supposed to.

D. The capsules cannot be distributed evenly throughout the plastic.

4.What does the professor imply about self-healing plastics that contain networks of channels?

A. They take much longer to manufacture than other types of self-healing plastics.

B. They are a better solution than the capsule technique.

C. They are used more often than plastics that contain capsules.

D. They do not last long when they are used in certain applications.

5.What does the professor imply about the speed with which self-healing plastics heal?

A. It is usually consistent for most types of damaged plastic.

B. It is significantly affected by temperature differences.

C. It needs to be improved.

D. It is faster than the speed at which biological healing occurs.

6.What does the professor say regarding the future of self-healing plastics?

A. An entirely new approach to creating them will probably be needed.

B. Their use will largely be confined to the aerospace industry.

C. Their future depends on whether they can extend the life of satellites.

D. It is possible that they could become affordable enough for the consumer market.

答案：

C C A B C D

Step2：观看错题或不确定的题目对应的讲解视频。（18分以下的同学建议每题都看一下，这样更扎实一些。）

第一题

第二题

第三题

第四题

第五题

第六题

看完讲解大家应该对题目应该没有疑问了，如果是思路问题和选项理解问题导致的错题需要进行总结，建议把题目截图放到word/pages或者其他文档中，然后简单描述一下自己错题的思路。每周都建议一下错题，尽量避免重复犯错。（18分以下的同学可以暂时忽略这个步骤，主要问题应该还是在文章理解上。）

接下来又是最为艰苦卓绝的听译环节，这步坚持下来练习就等于完成了一大半。