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【单选题】
女，65岁，咳嗽、痰中带血，胸痛2个月，无明显发热。X线胸片发现，右下肺周边有一直径6cm的结节状阴影，首先应考虑为A.
肺脓肿
B.
结核瘤
C.
周围型肺癌
D.
团块状矽结节
E.
转移性肺癌
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【单选题】用 0.1mol/L 的 NaOH 滴定 0.1mol/LHCl 与 0.1mol/LNH 4 Cl ( NH 3 · H 2 O 的 pK b =4.75 )的混合液 , 化学计量点的 pH 值为( )
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【单选题】用0.1mol/L的NAOH滴定0.1mol/LHCl与0.1mol/LNH4Cl（NH3•H2O的pKB=4.75）的混合液，化学计量点的pH值为（）
A.
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B.
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D.
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