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It is reported that the population of China   smaller in the past few months. The aging(老龄化) is...

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reported    was reported    has been reported    will be reported  
H3PO3  H4PO3  H3PO4  H2PO3  
was reported    it was reported    were reported    they were reported  
pO↓pCO↑pH↑  pO↑pCO↑pH↓  pO↓pCO↓pH↑  pO↓pCO↑pH↓  pO↓pCO↓pH↓  
po>ih>im>iv  ih>im>iv>po  im>iv>po>ih  iv>po>ih>im  iv>im>ih>po  
to see; are reported    to have seen; which are reported    seeing; which are reported    seeing; which reported  
H3PO4+NaH2PO4  Na3PO4+Na2HPO4  NaH2PO4+Na2HPO4  H3PO4+Na3PO4  
Which is reported    What is reported    As is reported    It is reported  
PO2与血氧容量间关系的曲线  PO2与血氧含量间关系的曲线  PO2与血氧饱和度间关系的曲线  PO2与血液pH间关系的曲线  PO2与PCO2间关系的曲线  
It has reported    As is reported    That is reported    It is reported  
It has reported  As is reported  That is reported  It is reported  
H2PO4-与PO43-  HPO42-与PO43-  HPO42-与H3PO4  
po.>ih.>im.>iv.  ih.>im.>iv.>po.  im.>po.>iv.>ih.  im.>po.>ih.>iv.  iv.>im.>ih.>po.  
H3PO4与PO43-  HPO42-与PO43-  HPO42-与H2PO4-  
was reported    it was reported    were reported   they were reported  
has reported seeing    have reported to see    has reported to see    have reported seeing  
was reported    it was reported    were reported    they were reported  

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