評論
打印
本聽力材料來自于老托partb，partc，是公認實施有效的聽寫材料，對于上手托福時間不長的同學非常適合。我曾經一次短時間備考聽力提高了7分也歸功老托。希望大家和我一樣一定要堅持下來噢。相信堅持學習的同學聽力上都會有很大的飛躍！
Nopain, no gain.我們的安排是這樣的，第一遍用聽力軟件精聽材料（建議做單句聽寫，聽寫的時候不要偷看我給的挖空題），然后按照我給的挖空題填關鍵詞，回復后即可看到聽力原文和文章精解，我將把難點和易錯點oneby one 分析給大家。
回復填空答案格式如下：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.
