女,70岁。起搏器植入术后卧床3天,下床活动时突发呼吸困难、意识丧失,急检血气示Pa058mmHg。最可能的诊断是( )。
Goods are carried by several of transport--on road or rail, by sea or air.
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
2002年新配方口服补液盐(ORS)溶液的张力是
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