gwd 27-2 ?!

Q2:

Electronic computer chips made of tiny silicon wafers now regularly contain millions of electronic switches.  Unfortunately, electronic switches that are this small cannot withstand intense radiation.  Micro-Mechanics plans to produce a chip that, because it uses only microscopic mechanical switches, will be invulnerable to radiation damage.  The switches will, however, be slower than electronic switches and the chip will contain only 12,000 switches.

For there to be a market for Micro-Mechanics’ chip as a result of the apparent advantage described above, each of the following would have to be true EXCEPT:

1. There will be applications in which the speed attainable by an electronic switch is not essential.

2. Switches used on electronic chips that contain only 12,000 switches are more vulnerable to radiation damage than the switches on Micro-Mechanics’ chip will be.

3. There will be applications for computer chips in environments where the chips may have to survive intense radiation.

4. Some devices in which computer chips will be used will have other components that will be able to function during or after exposure to radiation.

5. Manufacturers are able to protect electronic computer chips against exposure to intense radiation, where this protection is necessary.

 WHY THE ANSWER IS E?!

My answer is B, too. Dose anybody argue for E??

E是正确答案。

题目中提到了两种chip－“electronic switches”(es)和“micro-mechanics' switches”(mms),它们各有优劣：es快但是抗不住intense radiation,mms慢但是能抗住。

问题是mms有市场，说明在某些情况下必须使用mms而不是es，那么“except”的意思就是找出一个情况可以不用mms而用es就可以了。

E选项说明了在某种情况下有必备的保护装置保护internse radiation，那么此时关心的就是速度问题了，那么显然在这种情况下mms的优势不复存在，劣势暴露出来，自然就没市场了，所以选E。

B选项重申了题干内容，即es抗不住intense radiation,但mms能，那当然mms是有市场的。

D为什么不对了？？？？？

D Some devices in which computer chips will be used will have other components that will be able to function during or after exposure to radiation.

我也在D和E里徘徊,但是还是选了E,现在看看也不知道D是怎么回事,又NN能分析下D和文章有啥关系么

D说有其他的devices可以再受到强辐射的时候工作，是针对所有的计算机的，所以这些devices的出现并不会对Micro-Mechanics’ chip 的市场形成负面的影响。有点类似于支持题中的the same as, 其他的compenents对辐射的作用是一样的，而Micro-Mechanics’ chip 有了invulnerable to radiation damage的优势，自然就是对Micro-Mechanics’ chip 有市场的一种支持作用.