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Delta's key to the next generation toefl test part 52

Phần đọc của các biện pháp TOfcFL khả năng của bạn để đọc và hiểu những đoạn văn bằng tiếng Anh, Bạn sẽ được thử nghiệm trên hiểu của bạn về những ý tưởng lớn, thông tin quan trọng, từ vựng, và các mối quan hệ giữa các ý tưởng trong các đoạn văn. | Tests 10. According to the passage the first refrigerated railcar used what material as a cooling agent 11. The word toxic in paragraph 5 is closest in meaning to Ether Ice Ammonia CFCs dense poisonous rare expensive 12. Look at the four squares Q Q 0. and 0 which indicate where the following sentence could be added to the passage. Where would the sentence best fit Gorrie s basic principle of compressing a gas and then sending it through radiating coils to cool it is the one most often used in refrigerators today. Scientists and inventors from around the world developed artificial refrigeration during the eighteenth and nineteenth centuries. 0 William Cullen demonstrated artificial refrigeration in Scotland in 1748 when he let ethyl ether boil into a partial vacuum. In 1805 American inventor Oliver Evans designed the first refrigeration machine that used vapor instead of liquid. 0 In 1842 physician John Gorrie used Evans s design to create an air-cooling apparatus to treat yellow-fever patients in a Florida hospital. 0 Gorrie later left his medical practice and experimented with ice making and in 1851 he was granted the first U.S. patent for mechanical refrigeration. 0 In the same year an Australian printer James Harrison built an ether refrigerator after noticing that when he cleaned his type with ether it became very cold as the ether evaporated. Five years later Harrison introduced vapor-compression refrigeration to the brewing and meatpacking industries. 506 Delta s Key to the Next Generation TOEFL Test Test 3 13-14 An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points. Methods of refrigeration have changed throughout history. Answer Choices T A .