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【单选题】
Many AIDS experts are not completely satisfied with results of the study becauseA.
only a limited number of chimpanzees are used for sampling the virus.
B.
it is now extremely difficult to find chimpanzees that carry the virus.
C.
the samples collected are from two different subspecies of chimpanzees.
D.
it does not provide reliable evidence of the link between SIV and HIV-
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【简答题】慢性肾衰竭患者胃肠道最早期的表现是 _____ _ ; _____ _ 表现与水、钠潴留及肾素活性增高有关。
【简答题】慢性肾衰竭患者胃肠道最早期的表现是____________；__________________表现与水、钠潴留及肾素活性增高有关；出现心包炎主要是与________有关，心包积液多为__________________性，可能与__________________破裂有关。
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