单项选择题

某一级反应 A?B,若A起始浓度为c0,经过5个半衰期后其浓度为:

A、25 c0
B、2-5c0
C、2-4c0
D、24c0
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问答题

Sunzi draws special attention to the changing dynamics in the opposite direction.

答案: Sunzi, also known as Sun Tzu, is a renowned ancient Chinese ...
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