不错哦 53．Which word best describe the writer’s attitude toward life? A．Passive B．Practical C．Positive． D．Disappointed． 54．What does the underlined sentence mean? A．A lot of people are living but they are not enjoying their life． B．A lot of people are living with dreams though their life is not enjoyable． C．A lot of people give up their dreams and yet are living a good life． D．A lot of people are struggling for and suffering from their dreams． 55．The hero’s life is not like what he expected．This is because _________． A．he chose the wrong major in the university B．he often changes his jobs C．he has his expectations from life D．He has moved to China 56．What can we infer from the passage? A．Life is easier in China B．Life in the US has too much competition C．“I” am enjoying life in China D．More Americans will move to China E An early invention by Albert Einstein has been rebuilt by scientists at Oxford University．They are trying to develop an environmentally friendly refrigerator that runs without electricity． We all know that modern fridges cause damage to the environment．They work by using a kind of man-made greenhouse gas called Freon, which is far more damaging than carbon dioxide． Now Malcolm McCulloch, an electrical engineer at Oxford, is leading a three-year project to develop appliances that can be used in places without electricity． His team has completed a model machine of a fridge patented in 1930 by Einstein．It used only pressurized gases to keep things cold．The design was partly used in the first refrigerators, but the technology was dropped when more efficient compressors （压缩机） became popular in the 1950s．That meant a switch to using Freon． Einstein’s idea uses butane （a gas） and water and takes advantage of the fact that liquids boil at lower temperatures, when the air pressure around them is lower． “If you go to the top of Mount Qomolangma, water boils at a much lower temperature than it does when you’re at sea level and that’s because the pressure is much lower up there,” said McCulloch． At one side is the evaporator （蒸发器）, a bottle that contains liquid butane．“If you introduce a new vapor above the butane, the liquid boiling temperature decreases and, as it boils off, it takes energy from the surroundings to do so,” says McCulloch．“That’s what makes it cold．” The gas fridges based on Einstein’s design were replaced by Freon-compressor fridges partly because Einstein’s design was not very efficient．But McCulloch thinks that by changing the design and replacing the types of gases used it will be possible to greatly increase the efficiency． However, McCulloch’s fridge is still in its early stages．“It’s very much a model machine,” he said．“Give us another month and we’ll have it working．” 57．According to the passage, an early invention by Albert Einstein _______． A．has been rediscovered because it costs much less and works more efficiently B．is being redesigned because it could be used in places without electricity
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