标题: 请教大全19-4~ [打印本页] 作者: ellie78 时间: 2010-4-20 19:42 标题: 请教大全19-4~ An experimental microwave clothes dryer heats neither air nor cloth. Rather, it heats water on clothes, thereby saving electricity and protecting delicate fibers by operating at a lower temperature. Microwaves are waves that usually heat metal objects, but developers of a microwave dryer are perfecting a process that will prevent thin metal objects such as hairpins from heating up and burning clothes. Which of the following, if true, most strongly indicates that the process, when perfected, will be insufficient to make the dryer readily marketable? (A) Metal snap fasteners on clothes that are commonly put into drying machines are about the same thickness as most hairpins. (B) Many clothes that are currently placed into mechanical dryers are not placed there along with hairpins or other thin metal objects. (C) The experimental microwave dryer uses more electricity than future, improved models would be expected to use. (D) Drying clothes with the process would not cause more shrinkage than the currently used mechanical drying process causes. (E) Many clothes that are frequently machine-dried by prospective customers incorporate thick metal parts such as decorative brass studs or buttons. 蒙了E，蒙对了...分析的时候不太明白为什么选这个...作者: gzpg 时间: 2010-4-21 02:49
题目第一句介绍了这种新干衣机的原理。第2句说鉴于它工作的原理，有个potential的risk就是它会加热金属，（这很危险的），，接下来重要的来了，，说这种干衣机在工艺上作了改进，对于衣服上薄的thin金属不会加温。