单项选择题
A.50mg／d B.100mg／d C.150mg／d D.50μg／d E.100μg／d
A.50μg／d B.100μg／d C.150μg／d D.200μg／d E.500μg／d
A.0.2mg／d B.2mg／d C.0.5mg／d D.5mg／d E.50mg／d
A.11.5mg／d B.13.5mg／d C.15.5mg／d D.16.5mg／d E.21.5mg／d
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