8. Which of the following substances contain calcium carbonate as the main chemical constituent?
(1) limestone
(2) chalk
(3) marble
A. (1) and (2) only
B. (1) and (3) only
C. (2) and (3) only
D. (1), (2) and (3) only
收錄日期: 2021-04-13 16:24:28
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