题海让大学四年没有难题
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单选题 The researchers caught an intermediate step in the process by which hydrogen is removed from tryptamine(色胺), namely the point at which a proton(质子) disappears from a carbon atom as the carbon-hydrogen ________ breaks

A. collar

B. bond

C. trap

D. net

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时间:2026-04-29 10:47:39

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