单项选择题
做局部浸润,1OOml利多卡因中加0.5ml的肾上腺素,其浓度将为()
A.1:200
B.1:2000
C.1:20000
D.1:200000
E.1:2000000
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单项选择题
A.1:200
B.1:2000
C.1:20000
D.1:200000
E.1:2000000
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