国际顶尖MBA申请交流平台--TOPWAY MBA

标题: Some meaning in the passage can't be sure [打印本页]

作者: isuffering 时间: 2003-5-6 18:23 标题: Some meaning in the passage can't be sure

Blood banks will shortly start to screen all donors to NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore about 10 percent of actual donors will still supply NANB-contaminated blood.

The trick in the passage I can’t be sure is as follows,
Is “all prospective blood donors” = “actual donors” here ?
Or “all prospective blood donors”= “actual donors” plus “the number of donors who would be disqualified by tests for NANB hepatitis”? My understanding is the latter .

Looking forward to discussion

作者: 复仇剑 时间: 2003-5-21 20:17

to issuffering
我认为你的思路是对的。由于我没有看到条件（选项）也不敢下结论，只否可补上选项？
此题公式可能为
5%*(all prospective blood donors) + 真正得NANB人 *　2/3 = 10% actual donors
关键在all prospective blood donors,得NANB人,actual donors 三者中间有个公式也就是将三者从逻辑上联立起来。曾记得有一道超速且罚款的占总数多少的一道题，二者应该属于同一种出题思路吧。仅代表个人意见，还请指正。

作者: isuffering 时间: 2003-6-3 22:31

Originally it's a CR problem , but I can't make sure the right meaning of the passage itself, i.e., to me it's a RC problem first , So i ask the problem here.

Blood banks will shortly start to screen all donors to NANB hepatitis. Although the new screening tests are estimated to disqualify up to 5 percent of all prospective blood donors, they will still miss two-thirds of donors carrying NANB hepatitis. Therefore about 10 percent of actual donors will still supply NANB-contaminated blood.
The argument above depends on which of the following assumptions?
A Donors carrying NANB hepatitis do not, in a large percentage of cases, carry other infections for which reliable screening tests are routinely performed.
B Donors carrying NANB hepatitis do not, in a large percentage of cases, develop the disease themselves at any point.
C The estimate of the number of donors who would be disqualified by tests for NANB hepatitis is an underestimate.
D The incidence of NANB hepatitis is lower among the potential blood donors than it is in the population at large.
E The donors who will still supply NANB-contaminated blood will donate the blood at the frequency for all donors.

The trick in the passage I can’t be sure is as follows,
Is “all prospective blood donors” = “actual donors” here ?
Or “all prospective blood donors”= “actual donors” plus “the number of donors who would be disqualified by tests for NANB hepatitis”? My understanding is the latter .

Looking forward to discussion

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