Critical Reasoning
试题详情
题目：
Traverton’s city council wants to minimize the city’s average yearly expenditures on its traffic 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 significantly less energy and cost no more to purchase. Moreover, the costs associated with the conversion of existing fixtures 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 likely to help minimize Traverton’s yearly maintenance costs?
Which of the following would it be most useful to know in determining whether switching to LED arrays would be likely to help minimize Traverton’s yearly maintenance costs?
选项:
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 traffic signals to lighting elements other than LED arrays
C、Whether the company from which Traverton currently buys incandescent bulbs for traffic signals also sells LED arrays
D、Whether Traverton’s city council plans to increase the number of traffic signal lights in Traverton
E、Whether the crews that currently replace incandescent bulbs in Traverton’s traffic signals know how to convert the existing fixtures so as to accept LED arrays
答案:
A
提问：
题目问，判断。知道什么能够帮助判断，安了LED灯之后，能帮助这个地方节省开支。想节省开支就要跟钱有关系，所以找和钱有关的。
A:LED灯至少跟现在的灯寿命一样（跟钱无关，排除）
D：是不是这个地方决定要多安装信号灯（一想安的灯多了，肯定消耗就上去了）
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