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  3. How does the amount of heat the sun gives off in two weeks compare with all othe

How does the amount of heat the sun gives off in two weeks compare with all othe

游客2023-09-22  50
问题 How does the amount of heat the sun gives off in two weeks compare with all other known sources and reserves of energy? [br] What have the scientists been studying?
选项 A、Ways to change solar energy directly into electricity.
B、Ways to change solar energy into a form of solid.
C、Ways to change solar energy into a form of heat.
D、Ways to change solar energy into a form of liquid.
答案 C
解析 本题询问科学家们一直在研究什么。根据原文(42)处可知，由于太阳对于各种形式燃料的生产如此重要，因此人们投入越来越多的时间和余钱来研究把太阳能直接转换为一种热能的方法，故选C。
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