【正文】 豆丁|英語(yǔ)，用請(qǐng)下載TPO16Conversation 1Narrator: Listen to a conversation between a student and a facilities manager at the university. Student: Hi. I’m Melanie, the one who’s been calling. Manager: From the singing group, right? Student: From the choir. Manager: Right, the choir. It’s nice to finally meet you in person. So, you are having problems with... Student: Noise. Like I explained on the phone we’ve always had our rehearsals in the Lincoln Auditorium every day at 3 o’clock and it’s always worked just great. But the past few weeks with the noise, it’s been a total nightmare since constructions started next door on the science hall. Manager: Oh, that’s right. They’re building that addition for new laboratories. Student: Exactly. Anyway, ever since they started working on it, it’s been so noisy we can barely hear ourselves sing. Manager: Let alone sing. Student: Forget about singing. I mean, we keep the windows down and everything, but once those bulldozers get going, I mean those machines are loud. We’ve already had to cut short two rehearsals and we’ve got a concert in 6 weeks. Manager: Well, that’s not good. I’m assuming you’ve tried to reschedule your rehearsals. They don’t do construction work at night. Student: Iran that by the group, but there were just too many. I mean evenings are really hard. It seems like everyone in the choir already has plans and some even have classes at night. Manager: And what about the music building? Student: You know, originally we were booked in one of the rehearsal rooms in the music building, but then we switched with the jazz ensemble. They’re a much smaller group and they said the acoustics, the sound in that room, was better for them. So having us moved to a bigger space like the Lincoln Auditorium seemed like a reasonable idea. Manager: But now... Student: All that noise. I don’t know. I just wonder if the jazz ensemble knew what was going to happen.Manager: Well, that wouldn’t be very nice. Student: No. But it really was quite a coincidence. Anyway, now the music building’s fully booked, mornings, afternoons, everything, we just need a quiet space. And it has to have a piano. Manager: A piano. Of course some of the other auditoriums have pianos, but that’s not going to be easy. Student: You think they’re pretty booked up? Manager: Probably. But it can’t hurt to check. What about Bradford Hall? I remember a piano in the old student center there. Student: At this point, we’d be grateful for any quiet place. Manager: Can you... How flexible can you be on times? You said no evenings, but what if can’t find something open at 3 o’clock? Can you move earlier or later? Student: I wish I could say another time would be okay, but you know how it is, everybody’s already got mitments for the whole semester 2:30 or 3:30 would probably be okay, but I don’t think we could go much outside that. Manager: Well, check with me tomorrow morning. I should’ve found something by then. It might not be ideal...Student: As long as it’s got a piano and nobody’s putting up a building next door, we’ll be happy.Lecture 1Narrator: Listen to a part of lecturer in a geology class. Professor: Now there are some pretty interesting caves in parts of the western United States, especially in national parks. There is one part that has over a hundred caves, including some of the largest ones in the world. One of the more interesting ones is called Lechuguilla Cave. Lechuguilla has been explored a lot in recent decades. It’s a pretty exciting place I think. It was mentioned only briefly in your books. So can anyone remember what it said? Ellen? Female student: It’s the deepest limestone cave in the .? Professor: That’s right. It’s one of the longest and deepest limestone caves not just in the country but in the world. Now, what else? Female student: Well, it was formed because of sulfuric acid, right? Professor: That’s it. Yeah, what happens is you have deep underground oil deposits and there are bacteria. Here let me draw a diagram. surface rock rock and water oil and bacteria Part of the limestone rock layer is permeated by water from below. Those curly lines are supposed to be cracks in the rock. Below the water table and rock is oil. Bacteria feed on this oil and release hydrogen sulfide gas. This gas is hydrogen sulfide, rises up and mixes with oxygen in the underground water that sits in the cracks and fissures in the limestone. And when hydrogen sulfide reacts with the oxygen in the water, the result of that is sulfuric acid, Ok? Sulfuric acid eats away at limestone very aggressively. So you get bigger cracks and then passageway is being formed along the openings in the rock and it’s all underground. Ah yes, Paul? Male student: So that water... it’s not flowing, right? It’s still? Professor: Yes, so there are two kinds of l