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TPO 36-L1
1. What is the lecture mainly about?
A. The role of fossil fuels as an energy source in the future.
B. Reasons for research into alternative energy sources.
C. The feasibility of using a potential energy source.
D. Causes of probable future energy problems.
答案：
C选项正确
解析：
本题出题点在于：Now last week when we discussed the serious energy challenges we are going to face as the world's population continues to grow and we place more stress on our finite supply of fossil fuels, especially natural gas and oil, well, maybe it's not all doom and gloom. In a number of areas, scientists are thinking outside the box and trying to come up with unusual, novel solutions to the energy question. Not that a positive outcome is inevitable by any means, but well, let's take a look at one of these creative ideas involving a gas - helium-3. 通过教授的这番话，我们得知他们在讲能源问题，并且提到最近科学家们发现了一种新的不寻常的能源可以来解决能源问题，那就是一种氢气——氢3。选项C的意思是主要讲了一种潜在能源来源的可能性，正确。其余三个选择不符合讲座意思。选择C。
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