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【单选题】
下列离子中,中心原子采取不等性杂化的是( ) (《无机化学例题与习题》吉大版)A.
H 3 O +
B.
NH 4 +
C.
PCl 6 -
D.
BI 4 -
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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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