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【单选题】
在药物比的计算公式[a]tD=(100a)/(L.C)中A.
t是25℃，C的单位是g/100mL，L的单位是dm
B.
t是25℃，C的单位是g/mL，L的单位是cm
C.
t是20C，C的单位是g/mL，L的单位是cm
D.
t是20℃，C的单位是g/100mL，L的单位是dm
E.
t是20C，C的单位是g/mL，L的单位是cm
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