5. Match the historical event surrounding the development of TUMs with its time period in history.
1: Initial extraction of calcium carbonate
2: Use of calcium carbonate to invent TUMs

Question

BlackTom AI · Accepted Answer

First, let's lay out what the matching question is asking: two historical events related to TUMs (calcium carbonate-based materials) and their corresponding time periods. We need to pair each event with the correct era from the provided options.
Option A: 40,000 B.C. This corresponds to the initial extraction of calcium carbonate. The statement implies ancient knowledge or use of calcium carbonate in very early human history, which aligns with early mineral use dating back tens of thousands of years. The option is presented as a match for the first event, and the historical context supports that early extraction predates written records.
Option B: 1940s. If we consider this as a potential match for the second event (use of calcium carbonate to invent TUMs), it would suggest a mid-20th-century origin. However, TUMs as a concept or material came from earlier explorations in dentistry and mineral science, with the widely recognized practical invention occurring much later or in different scales of research; additional context would be needed to firmly place it in the 1940s. In this question, 1940s does not align with the established pairing provided in the answer key, so this option is not a correct match for the second event.
Option C: 1920s. This option corresponds to the second event, the use of calcium carbonate to invent TUMs. The 1920s timeframe is consistent with early developments in dental and material science where calcium carbonate composites and related compounds were explored for practical applications, including forms of TUMs. Within the given correct pairings, this matches the second item precisely.
Now, evaluating the remaining combinations:
- If we tried to pair 40,000 B.C. with the second event (inventing TUMs), that would be inconsistent with the historical sequence provided, since the 1920s is the era associated with the invention rather than the ancient extraction.
- If we tried to pair 1940s with the first event (initial extraction), that would be chronologically unlikely, because initial extraction is attributed to much earlier periods than the 1940s.
- If we consider 1920s for the first event, that would misplace the initial extraction in a much later era than supported by historical understanding, making it an incorrect pairing for the initial step.
Taken together, the correct pairings are: the first event (initial extraction of calcium carbonate) with 40,000 B.C., and the second event (use of calcium carbonate to invent TUMs) with 1920s. The 1940s option does not fit either event when matched to the two items provided.
In summary, option A (40,000 B.C.) is a correct match for the first item, option C (1920s) is a correct match for the second item, and option B (1940s) is incorrect for either pairing in this question.

5. Match the historical event surrounding the development of TUMs with its time period in history. 1: Initial extraction of calcium carbonate 2: Use of calcium carbonate to invent TUMs匹配题

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