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题库 / Prep2012-CR-69
Southington University's fund-raisers succeeded in getting donations from 80 percent of the potential donors they contacted this year. This rate would be the expected rate if the only potential donors contacted were those who have donated in the past. But good fund-raisers constantly contact less likely prospects in an effort to expand the donor base. Thus the high success rate, far from showing that the fund-raisers did a good job, shows insufficient canvassing effort.
Which of the following, if true, most seriously weakens the argument?
Among potential donors contacted by Southington University's fund-raisers, the majority of those who did not make donations were people who had made donations to the university in the past.
The amount of money raised by Southington University's fundraisers this year was lower than the amount they had raised in any of the previous several years.
Individual donations made to Southington University this year were, on average, slightly larger than were average individual donations made to many other universities.
Fund-raisers contacting past donors are not only to get new donations but also to get names of potential new donors to contact.
The majority of the donations that fund-raisers succeeded in getting for Southington University were from donors who had never given to the university before.
题干：SU获得了今年联系的潜在捐款人的80%的捐款。这个比例挺高的，但是跟（那些过去曾经捐过款的人）再捐款的预期比例是一致。所以看起来fund-raisers没有很努力去扩大捐款人的基数。因此80%这个很高的成功率，不能说明fund-raisers 干得好；求削弱；
题干有坑点，问法(不能说明活儿好->求削弱 ) 等同于 (说明活儿没干好->求削弱) 等同于 (取非求加强) , 即问找个选项能说明活儿干地好;
A暗指了SU募集人联络的是那些以前捐过款但是却没捐给SU的人, 符合题干的捐过款的人更容易再捐款,而这些人只不过过去没捐给SU,说明了SU募集人游说成功;
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