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【单选题】
理想中i + =i - =0 ,这种现象称为( )。A.
虚断
B.
虚短
C.
虚地
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【单选题】患者,男,55岁,因需静脉尿路造影,口服碘过敏试验引起的阳性反应,其症状是
A.
口腔黏膜充血、水肿
B.
面色苍白、口唇紫绀
C.
胸闷、呼吸困难
D.
口麻、心慌、恶心、呕吐、荨麻疹
E.
体温、脉搏、呼吸、血压无改变
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