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—I think we’re all here now.Sara, you’re doing a presentation on a medical topic
—I think we’re all here now.Sara, you’re doing a presentation on a medical topic
游客
2023-10-14
40
管理
问题
—I think we’re all here now.Sara, you’re doing a presentation on a medical topic.You said you’d like to start by mentioning a few important medical treatments which have been developed in the last hundred or so.What’ s the first?
—The first is penicillin, which was discovered in 1928.At first nobody realized_________.Then a few years later, scientists decided to try using penicillin on laboratory mice.That’ s how they that penicillin can successfully kill many serious infections.
选项
A、how a lethal dose of radiation could be exceeded
B、how it caused my toothache
C、how it could be used
D、how it could be infected
答案
C
解析
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