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想请教大家Prep 2012 第57题：
When a city experiences a sharp decline in population, thecity's tax revenues, which pay for such city services as police protection andmaintenance of water lines, also decrease. The area to be policed and thenumber and length of the water lines to be maintained, however, do notdecrease. Attempting to make up the tax revenue lost by raising tax rates isnot feasible, since higher tax rates would cause even more residents to leave.(Prep 12 – 57) The information given moststrongly supports which of the following general claims? A. If, in a city with sharplydeclining population, police protection and water line maintenance do notdeteriorate, some other service previously provided by the city willdeteriorate or be eliminated. B. If a city's tax rates are heldstable over a period of time, neither the population nor the levels of cityservices provided will tend to decline over that period. C. If a city's populationdeclines sharply, police protection and water line maintenance are the servicesthat deteriorate most immediately and most markedly. D. A city that suffers revenuelosses because of a sharp decline in population can make up some of the losttax revenue by raising tax rates, provided the city's tax rates are low inrelation to those of other cities. E. A citythat is losing residents because tax rates are perceived as too high by thoseresidents can reverse this population trend by bringing its tax rates down to amore moderate level.
正选为A. 我的问题:
1. 看了一些资源的解释, 似乎这道题infer的中心变成了推出”虽然某些维护费用不变, 这个city仍能generate tax revenue“的原因. 这是因为原文中说"the city's tax revenue...also decrease" 从而得知即便利润下降，但是利润依然是存在？
2. 原文中说了raising tax rates will cause more residents to leave. 我记得好像逻辑中A 上升时B下降, 是可以反推A下降时B会上升?
请各位指教.
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发表于 2016-11-19 15:44:22
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