我是准备GMAT的 拿Lsat的逻辑练练手，感觉真是相当不一样， gmat的逻辑套路还是比较规范的，而lsat感觉......
下面是两道刚刚做的题
8. Measurements of the extent of amino-acid decomposition in fragments of eggshell found at archaeological sites in such places as southern Africa can be used to obtain accurate dates for sites up to 200,000 years old. Because the decomposition is slower in cool climates, the technique can be used to obtain accurate dates for sites almost a million years old in cooler regions.
The information above provides the most support for which one of the following conclusions?
(A) The oldest archaeological sites are not in southern Africa, but rather in cooler regions of the world.
(B) The amino-acid decomposition that enables eggshells to be used in dating does not take place in other organic matter found at ancient archaeological sites.
(C) If the site being dated had been subject to large unsuspected climatic fluctuations during the time the eggshell has been at the site, application of the technique is less likely to yield accurate results.
(D) After 200,000 years in a cool climate, less than one-fifth of the amino acids in a fragment of eggshell that would provide material for dating with the technique will have decomposed and will thus no longer be suitable for examination by the technique.
(E) Fragments of eggshell are more likely to be found at ancient archaeological sites in warm regions of the world than at such sites in cooler regions.
答案给的是C,虽然其他的几个选项确实没道理 但对于C而言， 我觉得题干只是阐述了气候温度和保存时间的关系，C中又涉及climatic fluctuations是不是有过度联想之嫌？
12. “Though they soon will, patients should not have a legal right to see their medical records. As a doctor, I see two reasons for this. First, giving them access will be time-wasting because it will significantly reduce the amount of time that medical staff can spend on more important duties, by forcing them to retrieve and return files. Second, if my experience is anything to go by, no patients are going to ask for access to their records anyway.”
Which one of the following, if true, establishes that the doctor’s second reason does not cancel out the first?
(A) The new law will require that doctors, when seeing a patient in their office, must be ready to produce the patient’s records immediately, not just ready to retrieve them.
(B) The task of retrieving and returning files would fall to the lowest-paid member of a doctor’s office staff.
(C) Any patients who asked to see their medical records would also insist on having details they did not understand explained to them.
(D) The new law does not rule out that doctors may charge patients for extra expenses incurred specifically in order to comply with the new law.
(E) Some doctors have all allowing their patients access to their medical records, but those doctors’ patients took no advantage of this policy.
答案给的A 问题我都看得不太懂 establish that second... cancel out first.... 两个resaon相互抵消，那不就是削弱吗？ 就是选出不能削弱医生结论的一项？ 那A不就是削弱了吗？ 不明白 请大牛解释一下 谢谢
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