单项选择题
A.采血针 B.听诊器 C.B超探头 D.血压计 E.温度计
A.≥20mg/m,≥30min B.≥20mg/m,≥60min C.≥50mg/m,≥30min D.≥50mg/m,≥60min E.≥100mg/m,≥30min
A.碘化钾 B.氢氧化钠 C.铬酸银 D.硼酸 E.硫酸锌
A.150mg/m B.250mg/m C.380mg/m D.680mg/m E.980mg/m
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