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Q我家的窗户原先是木窗框,后来改用铝合金的窗框,但保温效果还不如原来的木窗框,这是什么道理?(初一学生)
Q My home’s window was originally a wooden window frame, but later changed to the aluminum alloy window frame, but the insulation effect was not as good as the original wooden window frame. What is the reason? (Primary student)