问题
单项选择题
用于冲洗智齿冠周炎的过氧化氢溶液的浓度应是（）
A.0.1％～0.3％
B.0.5％～0.9％
C.1％～3％
D.1.5％～2％
E.3％～5％
答案
参考答案：C
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用于冲洗智齿冠周炎的过氧化氢溶液的浓度应是（）
A.0.1％～0.3％
B.0.5％～0.9％
C.1％～3％
D.1.5％～2％
E.3％～5％
参考答案：C
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