Passage above for each answer. Write your answers in boxes 11-14 on your answer sheet. Traditional refrigerators use 11___________ pumps to drop temperature. At present, scientists are searching for other methods to produce refrigeration, especially in computer microprocessors 12___________ materials have been tried to generate temperature drops five times bigger than any previously recorded 13___________ effect has also been adopted by many researchers to cool hotspots in computers. A miniature version of a car 14___________ may also be a system to realize ideal computer cooling in the future.

11.___________

13.___________

14.___________

12.___________

請(qǐng)幫忙給出每個(gè)問(wèn)題的正確答案和分析，謝謝！