酶的最适pH是() ["酶的特征性常数","酶促反应速度最大时的pH","酶最稳定时的pH","与底物种类无关的参数","酶的等电点"]
对该患诊断冠心病最有价值的检查结果是() ["运动实验阳性","心电图有ST段下降和T波改变","目前的心前区疼痛无其他原因可以解释","冠状动脉造影发现罪犯血管","心脏超声显示左室后壁运动减弱"]
门静脉高压症的主要原因是() ["门静脉主干先天性畸形","肝静脉血栓形成、狭窄","肝段下腔静脉阻塞","肝硬化","各种原因致脾静脉血流量过大"]
"检查者用手以一定力量捏压腓肠肌"属于() ["Gonda征","Gordon征","Chaddock征","Babinski征","Oppenheim征"]
抗胆碱类药物中毒的临床表现,正确的是()。 ["发热、心跳减慢","瞳孔缩小、视物模糊","烦躁不安、兴奋","唾液分泌增多","脉搏减慢"]
急性胰腺炎最常见的原因是()和()。