本套真题为2017.9.21/2016.1.9/2011.2.19 雅思听力真题《Solar Water Purifier(SW40)》（Part4）， 共10题，题型包括填空题6题、flow_chart4题。配套AI逐题解析、同义替换与错因分析， 支持在线机考模式练习，适合冲刺雅思听力高分的考生备考使用。
00:00:00,140You will hear a lecturer giving a talk to design and technology students about a new device which uses the sun to purify water. First, you have some time to look at questions thirty-one to forty. Now listen carefully and answer questions thirty-one to forty. 00:00:20,420For many parts of the world today, a lack of clean drinking water is a major problem. In some developing areas, bore water, which is water that comes out of the ground, is the only water available. 00:00:35,080Unfortu...
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