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题库 / GMATLA-CR-104
Political Advertisement:Mayor Delmont's critics complain about the jobs that were lost in the city under Delmont's leadership. Yet the fact is that not only were more jobs created than were eliminated, but the average pay for these new jobs has been higher than the average pay for jobs citywide every year since Delmont took office. So there can be no question that throughout Delmont's tenure the average paycheck in this city has been getting steadily bigger.
Which of the following, if true, most strengthens the argument in the advertisement?
The average pay for jobs created in the city during the past three years was higher than the average pay for jobs created in the city earlier in Mayor Delmont's tenure.
Average pay in the city was at a ten-year low when Mayor Delmont took office.
Some of the jobs created in the city during Mayor Delmont's tenure have in the meantime been eliminated again.
The average pay for jobs eliminated in the city during Mayor Delmont's tenure has been roughly equal every year to the average pay for jobs citywide.
The average pay for jobs in the city is currently higher than it is for jobs in the suburbs surrounding the city.
逻辑链：P:因为新增工作数量比废除的工作数量更多，并且新增工作的平均工资比自从D上任之后的平均工资都要高->C:在D的任期内城市的平均工资收入越来来高
(D):废除的工作的平均收入和平均工资相当，可以增强结论。如果砍掉的工作普遍都是那种高薪工作那么就会削弱结论
好像这条讲的最清楚！
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逻辑链：P:因为新增工作数量比废除的工作数量更多，并且新增工作的平均工资比自从D上任之后的平均工资都要高->C:在D的任期内城市的平均工资收入越来来高
(D):废除的工作的平均收入和平均工资相当，可以增强结论。如果砍掉的工作普遍都是那种高薪工作那么就会削弱结论
https://www.ptt.cc/bbs/GMAT/M.1343623279.A.4C2.html
a.CR 常會犯的錯誤毛病 就是在已經確定的事實做更細部的推論 這無法往後推論到has been getting steadily bigger
题目P中注意了 新工作数量比消除的工作多-------新工作平均工资比整体 平均工资多——-C: 整体平均工资增加 要加强 应该是消除的平均工资小于或等于整体工资
a, 过去三年比D执政早期的平均公司要高。→ 自己和自己比，不对。
d, 削减的工作的工资是等同于全市的平均工资→ 削减的工作的工资=全市的平均工资＜新的工作的工资，同时新的工作数量＞削减的工作数量 →可以推出paycheck has been getting bigger
a 错误是 对比过去三年新增岗位的平均工资和d执政前期的新增岗位的平均工资对比，没有提到其废掉的工作之前岗位的工资情况，纵向对比充分没有横向对比，所以d是对的，这样横向纵向都sufficient
A选项的错误在于对比的是过去三年新增岗位的平均工资与D执政前新增岗位的平均工资。但是题目里问的是“ throughout Delmont's tenure ”， 和执政前没有关系。所以答案是D
这个城市的average paycheck时候grow steadily，是和自己以往相比
错选A, A与题干中的the average pay for these new jobs has been higher than the average pay for jobs citywide every year since Delmont took office说法好类似，所以应该不是答案，重复前提没用
是 支持 广告，，，，
楼主是在A和D里面纠结吧。
题干：New>eliminated的工作数量，New pay>average pay
推出： average pay(D的任期内)>average pay(D任期之前)
变化的工作数量=New-eliminated的工作数量，即使新增加的工作数量更多，即变化的工作数量为正数，但是如果被撤销的工作的平均工资>New pay(>average pay),有可能变化的工资总量（=NewXNew pay- eliminatedXeliminated pay）为负，那么在D的任期之内，总的平均工资还有可能下降。