?$解：$?
?$(1\mathrm {)}碳酸鈣中鈣、碳、氧元素的質(zhì)量比為：40∶12∶(16×3\mathrm {)}=10∶3∶12$?
?$(2\mathrm {)}碳酸鈣中鈣元素的質(zhì)量分數(shù)=\frac {40}{100}×100\%=40\%$?
?$(3\mathrm {)}小明每天從鈣片中攝入鈣元素的質(zhì)量=鈣片片數(shù)×每片鈣片中所含鈣元素的質(zhì)量$?
?$=鈣片片數(shù)×每一片鈣片所含碳酸鈣質(zhì)量×碳酸鈣中鈣元素的質(zhì)量分數(shù)$?
?$=2×0.75\mathrm {g}×40\%=0.60\mathrm {g}；$?
?$(4\mathrm {)}根據(jù)每天需要喝的牛奶中含鈣量=每天所吃的鈣片中鈣元素的質(zhì)量。$?
?$設(shè)：每天至少需要喝牛奶的體積為\mathrm {V}，則$?
?$\frac {\mathrm {V}}{100\mathrm {mL}/\mathrm {g}}=0.60\mathrm {g} ，解得\mathrm {V}=600\mathrm {mL}$?
