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【单选题】
废纸被加工成纸浆,又成为造纸的原材料;废钢被加工后又进入冶炼回炉变成新的钢材,废水经净化后又被循环使用等。这类物质的流动形成()。A.
废弃物物流
B.
回收物流
C.
生产物流
D.
流通物流
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【单选题】室间隔缺损的患儿有时出现声音嘶哑,最常见的原因为
A.
左心室增大，压迫喉返神经
B.
肺动脉扩张，压迫喉返神经
C.
左、右心室增大，压迫喉返神经
D.
右心室增大，压迫喉返神经
E.
左心房增大，压迫喉返神经
【简答题】C Across Britain,burnt toast will be served to mothers in bed this morning as older sons and daughters rush to deliver their supermarket bunches of flowers.But,according to a new study,we should be pl...
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【单选题】室间隔缺损的患儿有时出现声音嘶哑,最常见的原因为
A.
左心室增大,压迫喉返神经
B.
肺动脉扩张,压迫喉返神经
C.
右心室增大,压迫喉返神经
D.
左、右心室增大,压迫喉返神经
E.
左心房增大,压迫喉返神经
【单选题】室间隔缺损的患儿有时出现声音嘶哑，最常见的原因为
A.
左心室增大，压迫喉返神经
B.
肺动脉扩张，压迫喉返神经
C.
左、右心室增大，压迫喉返神经
D.
右心室增大，压迫喉返神经
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