Radon-210 is more radioactive than Technetium-99. Since Promethium-61 is more radioactive than Protactinium-234, it follows that Radon-210 is more radioactive than Protactinium-234.
Any of the following, if introduced into the argument as an additional premise, makes the argument above logically correct EXCEPT:
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ATechnetium-99 is more radioactive than Promethium-61.
分析该选项
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BPromethium-61 and Technetium-99 have equal levels of radioactivity.
分析该选项
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CPromethium-61 and Radon-210 have equal levels of radioactivity.
分析该选项
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DPromethium-61 is more radioactive than Radon-210.
分析该选项
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ETechnetium-99 is more radioactive than Protactinium-234.
分析该选项
显示答案
正确答案: D