Question 18:
Last year all refuse collected by Shelbyville city services was incinerated. This
incineration generated a large quantity of residue ash. In order to reduce the amount
of residue ash Shelbyville generates this year to half of last year’s total, the city has
revamped its collection program. This year city services will separate for recycling
enough refuse to reduce the number of truckloads of refuse to be incinerated to half
of last year’s number.
Which of the following is required for the revamped collection program to achieve its aim?
A. This year, no materials that city services could separate for recycling will be incinerated.
B. Separating recyclable materials from materials to be incinerated will cost Shelbyville
less than half what it cost last year to dispose of the residue ash.
C. Refuse collected by city services will contain a larger proportion of recyclable
materials this year than it did last year.
D. The refuse incinerated this year will generate no more residue ash per truckload
incinerated than did the refuse incinerated last year.
E. The total quantity of refuse collected by Shelbyville city services this year will be
no greater than that collected last year.
答案是什么，请高人指教。另外CD下载的GWD第二套题的答案部分很混乱，不知哪里有确切版本？
This is a question on assumption. the premise is that the number of truckloads will be halved. then the ashes generated will be half of that produced previously. the lines of reasoning is from refuse to ashes. B could be eliminated immediately for its concern with cost.
A is not correct, the argument already offer information that the recyclables will be separated from those non-recyclables that will be incinerated. therefore it will be a assumption.
C is not appropriate. the recyclable refuse have been already separated from non-recyclable. according to the passage, then the truckload are full of the non-recyclables. what is mentioned in C is not supportive to the conclusion.
E is not appropriate, the argument has alread made it a premise that the city services will reduce the number of truckloads to half of last year.
D is correct choice, the quantity of refuse this year is half, and each truckload will not produce more residue. so the amount of total residues will be halved.
hope for comments, thank you.
同意D。谢谢！
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