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问题描述：

[单选] YLE考试分为几个等级？
A．1个 B．2个 C．3个
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答案解析：无
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随机题目

一位67岁的住院病人，因左小腿深静脉血栓形成和肺栓塞，目前正在接受肝素静脉滴注，每小时一次。不幸的是，由于一个计算错误，肝素滴速是正常滴速的100倍。硫酸鱼精蛋白立即静脉注射。这种代理是通过下列哪一种作用机制起作用的？A 67-year-old hospitalized patient with a deep venous thrombosis of the left calf and pulmonary embolism is currently on intravenous heparin on an hourly drip． Unfortunately， because of a calculation error， the heparin drip is running at 100 times the rate it should be running at． Protamine sulfate is immediately given intravenously． This agent works by which of the following mechanisms of action？
胆碱能系统激活所产生的下列效果中哪一项不是预期的？Which of the following effect is not expected from cholinergic system activation？
充分激活副交感神经系统可能产生下列哪一种效果？Full activation of the parasympathetic nervous system is likely to produce which of the following effects？
在夏令营的严重儿童住院症状是由于摄入了含有肉毒杆菌毒素的食物。下列哪一项徵状或症状符合肉毒杆菌中毒的诊断？Severe children at a summer camp were hospitalized symptoms through to be due to ingestion of food containing botulinum toxin． Which one of the following signs or symptoms is consistent with the diagnosis of botulinum poisoning？
一名农作物喷粉机飞行员意外地接触了高浓度的高毒性OPC杀虫剂。如果不加以治疗，这种接触的死亡原因可能是（）？A crop duster pilot has been accidentally exposed to a high concentration of a highly toxic agricultural OPC insecticide． If untreated， the cause of death from such exposure would probably be（）？
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