105.【water-supply system】by deadelf (760 Q51 V41)
说一个地方C的small water-supply system 多因为没钱 但小的test water pollutant的能力差 随着proportion of consumer of small water supply system的增加 该地方人饮用被污染的水的可能也就增加
问evaluate 这是楼主的最后几题
LZ选的是 是不是new consumer中原来有很多是使用自家untested water from well的
100.【地铁站改建改善交通】by vitani
关于地铁站改建来改善交通，prep原题
（可是我没找到……）
感谢 liberal00 给大家找到原题~
Crowding on Mooreville’s subway frequently leads to delays, because it is difficult for passengers to exit from the trains. Subway ridership is projected to increase by 20 percent over the next 10 years. The Metroville Transit Authority plans to increase the number of daily train trips by only 5 percent over the same period. Officials predict that this increase is sufficient to ensure that the incidence of delays due to crowding does not increase.
Which of the following, if true, provides the strongest grounds for the officials’ prediction?
A. By changing maintenance schedules, the Transit Authority can achieve the 5 percent increase in train trips without purchasing any new subway cars.
B. The Transit Authority also plans a 5 percent increase in the number of bus trips on routes that connect to subways.
C. For most commuters who use the subway system, there is no practical alternative public transportation available.
D. Most of the projected increase in ridership is expected to occur in off-peak hours when trains are now sparsely used.
E. The 5 percent increase in the number of train trips can be achieved without an equal increase in Transit Authority operational costs.
选D
