单项选择题
用碱性苦味酸试剂测定血Cr,应准确地读取反应后哪两个时间点的吸光度()。
A.10s和20s
B.20s和80s
C.20s和150s
D.10s和100s
E.60s和120s
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单项选择题
A.10s和20s
B.20s和80s
C.20s和150s
D.10s和100s
E.60s和120s
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