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【单选题】
循证医学所收集的证据中,质量最佳者为A.
设计良好的随机对照试验
B.
设计较好的队列研究
C.
设计较好的病例对照
D.
病例报告或者有缺点的临床试验
E.
专家意见或者基于生理、病理生理和基础研究的证据
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【简答题】阅读理解。 Death Valley is one of the most famous deserts in the United States, covering a wide area with its alkali sand. Almost 20 percent of this area is well below sea level, and Badwater, a salt water...
【单选题】The area is ______ with trails, some as wide as boulevards, that have been cut and maintained by elephants.
A.
blackmailed
B.
latticed
C.
isolated
D.
galloped
【简答题】Death Valley is one of the most famous deserts in the United States, covering a wide area with its alkali sand Almost 20 percent of this area is well below sea level, and Badwater, a salt water pool, ...
【简答题】Death Valley is one of the most famous deserts in the United States, covering a wide area with its alkali sand. Almost 20 percent of this area is well below sea level, and Badwater, a salt water pool,...
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