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Answer:The use of the nuclides produced is various. It is therefore generally easier to separate isotopes with a larger relative mass, this method is a form of mass spectrometry
Explanation:
Ok think about his, what do tv programs and radio programs get interrupted by every few minuets
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I guess the paragraph break should be after the B) Ellen asked and "How are you feeling?" and Ellen said. Because while reading this dialog, reader need a pause between the information which these characters exchange. In my opinion, there must be graphical and emotional space between their introduction and next action that hasn't revealed yet. Also, I'd choose B to make this conversation looks alive.