与吗啡竞争性拮抗同一受体的药物是() ["可待因","吗啡","哌替啶","美沙酮","纳洛酮"]
浮而细软无力的脉象是()。 ["细脉","微脉","弱脉","濡脉","虚脉"]
如图所示,为在两侧有块石压载的抛石斜坡堤。2t四脚空心块的安放顺序可为()。 ["c→b→a","a→b→c","a→b与c→b同时","a→b与b→c同时","b→a与b→c同时"]
梅雨季节(气温22~25℃),2000只3周龄肉鸡群突发食欲减退,被毛蓬乱,精神沉郁,呆立一隅,冠及可视黏膜苍白。排水样稀便并快速消瘦,进而粪便带血。日死亡率5%~10%对该群鸡病的诊断首先需进行的检查是() ["病毒分离鉴定","细菌学检查","血液学检查","免疫学检测","病理剖检"]
具有浮散无根,至数不匀特点的脉象是()。 ["虚脉","动脉","疾脉","散脉","微脉"]
简述王渔洋(王士禛)“神韵说”的主要内容。