单项选择题
泥石流按流态特征可分为( )和粘性泥石流.
A.泥流
B.水石流
C.稀性泥石流
D.坡面型泥石流
A.
A.泥流
B.水石流
C.稀性泥石流
D.坡面型泥石流
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单项选择题
For centuries, the Atlantic Ocean kept the New World from____by the people of Europe discovered
A.discover
B.discovered
C.discovering
D.being
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单项选择题
男性患者,58岁,因无痛性肉眼血尿伴右腰部酸胀就诊,医生初步诊断为“肾肿瘤”,应首先进行何项检查()
A.X线腹部平片
B.肾动脉造影
C.IVP
D.B超
E.ECT
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