问题
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:2/5,5/8,8/11,() A.5/6B.11/14C.6/7D.13/15
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1/2,1,7/8 ,5/8 ,13/32 ,()A. 1/4 B. 15/64 C. 11/64D. 7/64
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1,2,3/2,8/5,5/3,12/7,() A.10/7 B.11/7 C.14/8 D.13/8
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1,2,3/2,8/5,5/3,12/7,() A.10/7 B.11/7 C.14/8 D.13/8
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2/5,5/8,8/11,() A.5/6B.11/14C.6/7D.13/15
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乳膏剂酸碱度一般控制在pH在A.4.2~11.0B.3.5~7.3C.4.4~8.3D.5.1~8.8E.6.3~9.5