【单选题】【消耗次数:1】
7. They hope to_________the source of the infection.
track down
look down
look at
back down
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相关题目
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【单选题】 Can you turn down the radio, please?
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随机题目
【单选题】 琥珀胆碱易产生的不良反应是
①  过敏反应
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③  后遗反应
④  耐受性
⑤  快速耐受性
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①  改变机体的生理机能
②  改变机体的生化功能
③  产生程度不等的不良反应
④  掩盖某些疾病现象
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①  静注给药
②  口服给药
③  舌下给药
④  深部肌肉注射
⑤  皮下注射
【单选题】 下列何药不是H1受体阻断药( )
①  苯海拉明
②  扑尔敏
③  雷尼替丁
④  息斯敏
⑤  异丙嗪
【单选题】 只对浅表真菌感染如头癣、手足癣效佳的抗真菌抗生素是
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②  制霉菌素
③  两性霉素B
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【单选题】 Codeine主要用于治疗( )
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②  B药LD50=100mg ED50=50mg
③  C药LD50=500mg ED50=250mg
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⑤  E药LD50=100mg ED50=25mg