男,36岁。因进餐时大笑,突发呼吸困难1小时。查体:可见“三凹征”及吸气相延长。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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