请教T-19-Q4

blink184

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.
这道题为何选E呢？
既然要可以perfected到组织衣服上薄金属融化，那厚的金属（thick metal ）就更不会融化了，怎么不marketable了？

yawei5252

汗。。我觉得这个逻辑有点牵强，，但是我是这样理解的：注意第一句heats neither air nor cloth. Rather, it heats water on clothes, thereby saving electricity ，这个新的dryer不加热空气或布料，只加热水，所以省电。如果未来的顾客们衣服上厚金属多了，根据能量守恒（汗，，我都觉得有点怪怪的了）厚金属吸收的大部分热还是要算进电的使用中，相当于你多加热了金属，多费了点。最后一句中的prevent thin metal objects such as hairpins from heating up中的heating up应该不能理解为加热而是理解为沸腾或融化之类的鬼东西吧，因为微波本身就具有加热金属的功能，这个无论如何也改不了的。。。。
          不对之处求指教。。。。