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【填空题】

最著名的全球巨型成矿域是()和古地中海-喜马拉雅成矿域(或特提斯成矿域)。

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参考解析:
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刷刷题刷刷变学霸
举一反三

【单选题】地中海性贫血的发病机制为

A.
造血干细胞增生和分化异常
B.
遗传性HB合成异常
C.
慢性失血
D.
获得性红细胞膜缺陷
E.
遗传性红细胞膜缺陷

【单选题】Passage2Questions 21 to 25 are based on the following passage:People travel for a lot of reasons. Some tourists go to see battlefields or religious shrines. Others are looking for culture, or simply w...

A.
they want to see historic remains or religious spots.
B.
they are interested in different cultural traditions and social customs.
C.
they would like to take pictures in front of famous sites.
D.
they wish to escape from the cold, dark and rainy days back at home.