一个老题目（但是出现在最新机经里面的）

colorsofthewind

2.  The reason much refrigerated food spoils is that it ends up out of sight at the back of the shelf. So why not have round shelves that rotate? Because such rotating shelves would have just the same sort of drawback, since things would fall off the shelves' edges into the rear corners.
Which of the following is presupposed in the argument against introducing rotating shelves?
(A) Refrigerators would not be made so that their interior space is cylindrical.
(B) Refrigerators would not be made to have a window in front for easy viewing of their contents without opening the door.
(C) The problem of spoilage of refrigerated food is not amenable to any solution based on design changes.
(D) Refrigerators are so well designed that there are bound to be drawbacks to any design change.
(E) Rotating shelves would be designed to rotate only while the refrigerator door was open.

还不是很理解。。。

寂寞的自由

答案是D，对吗？请给予答复

chenmoon

答案是A吧？

因为冰箱每一层靠后面的东西老是看不见，为了防止放在冰箱靠里面的东西坏掉，于是就有人建议把冰箱每一层的架子设计成圆的，并且能转动（感觉就像是微波炉的玻璃托盘），但是这样做也有一个缺点，就是东西容易从架子后面掉下去。作者的前提就是冰箱不能设计成内部形状同样也是圆形的。如果设计成圆的，东西就不会从架子上掉下去了。

colorsofthewind

Key: A.

好像是明白，但是选择的时候这个好像和理解没有多大关系，靠想象力来着。。。遇到这种题目，这么办呢？

stellarblue

我觉得这就是gmat和lsat的区别之一吧，不是仅靠逻辑，还要有一些延展，
而好方法就是看他思路中间又没有不连续的跳跃，中间就是假设！（一般来讲的）

寂寞的自由

这道题用一些技巧性的东西不能快速解决吗？
Which of the following is presupposed in the argument against introducing rotating shelves?
这样的文章问题方式应该如何结合题目来考虑呢？我解这个题的时候，完全用的是XDF的技巧，结果错误答案，脸红！！！

cranberry

我的理解就是看文中的意思，文中提到了back和corner,说明这个corner是一定要存在的，那么只有选A了，当然，我也是在否定了其它的选项后更确认了结论。

dandan74

assumption的题目有的时候可以取反，看看是不是推翻原来的结论，A取反明显使
since things would fall off the shelves' edges into the rear corners的premise不成立，进而推翻了结论。other choices are ”out of scope"