男性，30岁，左前胸刀刺伤半小时，查体：烦躁不安，皮肤苍白湿冷，呼吸困难，脉细弱，140次/分，颈静脉怒张，血压70/50mmHg.左前胸第5肋间处见约4cm刀伤口。最可能的诊断是
A、心脏压塞A
暂无解析
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Hardlyhadhefinishedhisspeech________theaudiencestartedcheering.
Theassociationis________toraisingfundstohelptheblind.
设某种元件的使用寿命T的分布函数为
TheTVstation,in________tomassivepopulardemand,decidedtocontinuethesoapopera(肥皂剧).
