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【单选题】
关于人工器官以下说法错误的是（ ）A.
人工器官只能暂时地代替身体某些器官的主要功能
B.
人工器官可以永久性地代替身体某些器官的主要功能
C.
人工肺、人工肾、人工心脏现在使用比较广泛
D.
硅橡胶、聚酯纤维、聚乙烯等可以用于人工器官
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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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