女性，38岁，反复尿频、尿急、尿痛半年，尿液检查为pH6.5，SG1.010，Pro0g/L，WBC2/μl，RBC12/μl；血CRE84μmol/l，BUN5.9mmol/L，K+3．1mmol/L，Na+136mmol/LC110mmol/L，Ca2+1.9mmol/L；B超检查提示双肾小结石或钙化
为明确诊断进一步检查首选
A. 24小时尿钙测定
B. 24小时尿钾钠氯测定
C. 尿氯化铵试验
D. 尿碳酸氢钠再吸收试验
E. 血醛固酮测定
为明确阴道出血的原因和性质，首选的诊断方法为
A. 阴道彩色多普勒B超
B. CT
C. MRI
D. CA125
E. 分段诊刮
A．The craftsmanship in toy making has remained essentially unchanged.B．Toys have remain
A. The craftsmanship in toy making has remained essentially unchanged.
B. Toys have remained basically the same all through the centuries.
C. The toy industry has witnessed great leaps in technology in recent years.
D. Toys are playing an increasingly important role in shaping a child's character.
6目前唯一用细胞培养获得减毒株的肝炎病毒是()
A. HAV
B. HBV
C. HCV
D. HDV
E. HEV
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