评论
打印
本听力材料来自于老托partb，partc，是公认实施有效的听写材料，对于上手托福时间不长的同学非常适合。我曾经一次短时间备考听力提高了7分也归功老托。希望大家和我一样一定要坚持下来噢。相信坚持学习的同学听力上都会有很大的飞跃！
Nopain, no gain.我们的安排是这样的，第一遍用听力软件精听材料（建议做单句听写，听写的时候不要偷看我给的挖空题），然后按照我给的挖空题填关键词，回复后即可看到听力原文和文章精解，我将把难点和易错点oneby one 分析给大家。
回复填空答案格式如下：1____2____3____...et.al.
Scientists are always on the lookout for ______ sources of energy. Today we're going to discuss one that's so plentiful they say it could supply more energy than all the coal and oil in the world. It's found in something called gas ______ and, believe it or not, that's a kind of ice.That's right. But the water in this ice was way down below the Earth's surface when it was frozen, so it was under a lot of pressure. And trapped inside the crystals of ice are individual molecules of ______ --- that's what's in natural gas.All this makes gas hydrate pretty strange stuff. If you touch a match to a piece of this ice, it'll burst into flame. And when geologists bring a _______ of it up to the surface to study at normal air pressure and temperature, gas hydrate begins to hiss and bubble --- and in less than half an hour, the ice melts and the methane inside escapes into the air.Now, as you might guess, this can make gas hydrate kind of hard for ______ to handle. And then there's the problem of where it's located --- in frozen arctic regions or in ocean waters off the Atlantic coast --- and up to a mile down.Environmentalists warn that mining it could even be disastrous. Offshore drilling could allow seawater to seep down into the huge icy ______ and release tons of methane up into the atmosphere. And methane, our listeners may recall, is a greenhouse gas that could really worsen the problem of global warming.So, gas hydrate may offer some interesting possibilities. But, with all these drawbacks, I'm not going to hold my breath waiting for it to fuel my furnace.
