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【简答题】
临床上把_________以上的消化管称为上消化道,_______以下的消化管称为下消化道。
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皮皮学刷刷变学霸
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【简答题】什麽叫模具的闭合高度（H 模具 ）？
【单选题】The passage suggests that, compared with Pleistocene carnivores in other areas, Pleistocene carnivores in the La Brea area______
A.
included the same species, in approximately the same proportions
B.
had a similar frequency of tooth fractures
C.
populated the La Brea more densely
D.
consumed their preys more thoroughly
E.
found it harder to obtain sufficiency prey