石膏的常规用量是A.15~60g B.9~30g C.30~90g D.9~15g E.15~45g

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问题 石膏的常规用量是

选项 A.15~60g
B.9~30g
C.30~90g
D.9~15g
E.15~45g

答案A

解析
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