标题: OG12 07 一个长难句读不懂。 求教！ [打印本页] 作者: 183077142 时间: 2010-8-15 14:18 标题: OG12 07 一个长难句读不懂。 求教！ Traverton’s city council wants to minimize the city’s average yearly expenditures on its traffi c signal lights and so
is considering replacing the incandescent bulbs currently in use with arrays of light-emitting diodes (LEDs) as the
incandescent bulbs burn out. Compared to incandescent bulbs, LED arrays consume signifi cantly less energy
and cost no more to purchase. Moreover, the costs associated with the conversion of existing fi xtures so as to
accept LED arrays would be minimal.
Which of the following would it be most useful to know in determining whether switching to LED arrays would be l ikely to help minimize Traverton’s yearly maintenance costs?
(A) Whether the expected service life of LED arrays is at least as long as that of the currently used incandescent bulbs
(B) Whether any cities have switched from incandescent lights in their traffi c signals to lighting elements other than LED arrays
(C) Whether the company from which Traverton currently buys incandescent bulbs for traffi c signals also sells LED arrays
(D) Whether Traverton’s city council plans to increase the number of traffi c signal lights in Traverton
(E) Whether the crews that currently replace incandescent bulbs in Traverton’s traffi c signals know how to convert the existing fi xtures so as to accept LED arrays
正选是A 但是A看不懂。。。我理解的是：是否期待的生活 of LED 是至少的 只要现在使用incandescent bulbs （好像不对） 或者at least as long as是在一块的？