我认为是D 可答案是E 为什么

lllmmm

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:
A.    There will be applications in which the speed attainable by an electronic switch is not essential.
B.    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.
C.    There will be applications for computer chips in environments where the chips may have to survive intense radiation.
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.
E.    Manufacturers are able to protect electronic computer chips against exposure to intense radiation, where this protection is necessary.
D说有一些部件能代替 chips 完成功能（在radiation之后），那岂不是说抗radiation的新型chip没什么用了吗？？？

sdcar2010

D说有一些部件能代替 chips 完成功能（在radiation之后），那岂不是说抗radiation的新型chip没什么用了吗？？？

You did not understand the meaning of D.

D says the device having the chip have to have other components that would not be damaged by the radiation.  This is necessary. Otherwise, the device would not function at all after the radiation, even if the chip survives.

D does not say that other component can replace the function of the chip.

E on the other hand, completely removes radiation as a threat to chips. Thus it removes the need and the advantage to have the new chip.

jaze

D说有一些部件能代替 chips 完成功能（在radiation之后），那岂不是说抗radiation的新型chip没什么用了吗？？？

You did not understand the meaning of D.

D says the device having the chip have to have other components that would not be damaged by the radiation.  This is necessary. Otherwise, the device would not function at all after the radiation, even if the chip survives.

D does not say that other component can replace the function of the chip.

E on the other hand, completely removes radiation as a threat to chips. Thus it removes the need and the advantage to have the new chip.

-- by 会员 sdcar2010 (2011/2/26 23:34:55)

good explanation

mudiduange

perfect explaination,sdcar2010