局部麻醉药物普鲁卡因中加入肾上腺素的浓度是 ( )A.1/2000000 B.1/20000 C.1/200000 D.1/200 E.1/2000

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问题局部麻醉药物普鲁卡因中加入肾上腺素的浓度是 ( )

选项 A.1/2000000
B.1/20000
C.1/200000
D.1/200
E.1/2000

答案C

解析

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