【正文】 s water ice on the moon. That would be a very practical value for a future moon base for astronauts. Water ice could be melted and purified for drinking. It could also be broken down into its ponent parts oxygen and hydrogen. Oxygen could be used to breathe, and hydrogen could be turned into fuel, rocket fuel. So water ice could enable the creation of a selfsustaining moon base someday, a mining camp perhaps or a departure point for further space exploration. Student: But holding tons of equipment to the moon to make fuel and build a life support system for a moon base, wouldn?t that be too expensive? Professor: Permanent base, maybe a way?s off, but we shouldn?t have to wait for that. The dust at the bottom of the SPA Basin really does have a fascinating story to tell. I wouldn?t give for a few samples of it. Conversation 2 Narrator Listen to a conversation between a student and a professor. Student Hi, I was wondering if I could talk with you about the assignment in the film theory class. Professor Of course, Jill. Student It seems that pretty much everyone else in the class gets what they are supposed to be doing but I?m not so sure. Professor Well, the class is for students who are really serious about film. You must have taken film courses before. Student Yeah, in high school, film appreciation. Professor Um…I wouldn?t think that would be enough. Did you concentrate mainly on form or content? Student Oh, definitely content. We?d watch, say Lord of the Flies, and then discuss it. Professor Oh, that approach, treating film as literature, ignoring what makes it unique. Student I liked it, though. Professor Sure, but that kind of class. Well, I?m not surprised that you are feeling a little lost. You know, we have two introductory courses that are supposed to be taken before you get to my course, one in film art, techniques, technical stuff and another in film history. So students in the class you are in should be pretty far along in film studies. In fact, usually the system blocks anyone trying to sign up for the class they shouldn?t be taking. And who hasn?t taken the courses you are required to do first as prerequisites. Student Well, I did have a problem with that but I discussed it with one of your office staff, and she gave me permission. Professor Of course. No matter how many times I tell them, they just keep on… Well, for your own good, I really suggest dropping back and starting at the usual place. Student Yes. But I?ve already been in this class for 4 weeks. I?d hate to just drop it now especially since I find it so different, so interesting. Professor I guess so. Frankly I can?t believe you?ve lasted this long. These are pretty indepth theories we?ve been discussing and you?ve been doing OK so far, I guess. But still, the program?s been designed to progress through certain stages. Like any other professional training we build on pervious knowledge. Student Then maybe you could remend some extra reading I can do to… catch up? Professor Well, are you intending to study film as your main concentration? Student No, no. I am just interested. I?m actually in marketing, but there seems to be a connection. Professor Oh…well, in…in that case, if you?re taking the course just out of interest, I mean I still highly remend signing up for the introductory courses at some point, but in the meantime, there is no harm I guess in trying to keep up with this class. The interest is clearly there. Eh, instead of any extra reading just now though, you could view some of the old introductory lectures. We have them on video. That would give you a better handle on the subject. It?s still a pretty tall order, and we will be moving right along, so you will really need to stay on top of it. Student OK, I?ve been warned. Now, could I tell you about the idea for the assignment? Lecture 3 Chemistry Narrator Listen to part of a lecture in a chemistry class. Professor Okay. I know you all have a lot of questions about this lab assignment that39。s talk about Spectroscopy a little now just to cover the basics. What is Spectroscopy? Well, the simplest definition I can give you is that Spectroscopy is the study of the interaction between matter and light. Now, visible light consists of different colors or wavelengths, which together make up what39。m gonna talk about art. I39。s e across this painting that appears to be an original let39。s an original. So, what do you do? How do you determine whether the painting39。s style. You39。s lifetime in the 17th century. And that39。t discovered until the 18th century. And since Rembrandt lived during the 17th century, we know he couldn39。t really talk about fairy tales without first talking about folk tales because there39。s local difference. And that3