叙述喷射加热器的工作原理，它适用于哪些地方（工序）。
参考答案：
喷射加热器主要由喷嘴、吸入室和扩大管组成。当物料以高速经过喷嘴时，它的动能增大，静压能变小，造成吸入室内出现负压，将蒸汽吸入室内，物料与蒸汽在扩散管的喉部充分混合，物料被加热，在扩散段内速度逐渐降低，压力随之升高，动能又转化为静压能，从出口排出。喷射加热器适用于连续加热物料的地方（工序），如连续灭菌等。
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| A good friend of mine, Gabriel, had a tiny farm in a small town. He only had a cow and dreamed about having a(n) 1 farm. He looked at the horizon (地平线) every sunset and once he told his father, "I'd like to have that 2 over there?" His father 3 him to go and talk to the landowner to see 4 they could obtain the land. Gabriel replied, "But we don't have the 5 ." His father said, "Don't worry, go and talk to him." Several years have passed and now Gabriel not only 6 the land but a theme park that 7 several hundred cows, a small zoo, horse ride cabalgatas (马队), four-wheel motors and much more fun of the whole family 8 . A year ago, when the park was already 9 a huge number of tourists, Gabriel's wife Sarah had a dream. "I want to build the 10 cow in the world," she said. They called a friend, Manuel Hernandez, for this 11 . In three days he had plans for the whole project. Then they asked,"How much will it 12 ?" Manuel mentioned a big sum of money. " 13 will loan (借贷) us that quantity of money to build a cow," they thought, but the manager of the bank 14 them and their dreams. Last October, La Manuela, the biggest cow in the world was 15 to the public. It is 9 meters tall and 16 meters long. The cow 16 eats you...and you travel inside the cow learning how grass is changed into 17 . Moral of the story. If you can dream about it and you put all your 18 and foremost desire to make it happen, it will become a(n) 19 despite how difficult or 20 it may sound. | ||||
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