单项选择题
A.1900,9.6 B.1800, 9.6 C.1900,8.0 D.1950,9.6
A.1900 B.1850 C.1800 D.1750
A. 31.5g~47.5g B. 31.3g~47.3g C. 30.5g~46.5g D. 32.5g~42.5g