妇科手术穿刺点() ["C7<\/sub>~T1<\/sub>","T4~5<\/sub>","T8~9<\/sub>","T11~12<\/sub>","T12<\/sub>~L1<\/sub>及L3~4<\/sub>"]
survival analysis
患者,男,28岁,因左耳间断性流脓伴听力下降3个月余入院。专科检查:左外耳道可见少量脓性分泌物,混有血液,性质黏稠,左耳鼓膜紧张部可见一米色肉芽循穿孔伸展于外耳道。
若经正规药物治疗后中耳炎症已完全吸收,仅遗留鼓膜紧张部中央性穿孔,最合适的术式为() ["单纯乳突开放","单纯鼓室成形","乳突开放+鼓室成形术","鼓室探查","鼓膜穿刺","乳突根治术"]
abridged life table
常用的切削液有两大类()。 ["水溶液、纯水","水溶液、油液","纯水、酒精","酒精液、油液"]
物资内质量受外界环境因素的影响有哪些?