练习2.20 完成下列各反应式-|||-(1) -C(H)_(3)xrightarrow (HI)-|||-(2) CH3 Br2-|||-CH3 Br2-|||-(3) CH3-|||-Br2-|||-(4) -60℃

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3-13 完成下列反应。-|||-(1) square -C(H)_(3)+H-|||-(2) -C(H)_(3)+(H)_(2)S(O)_(4)-|||-CH

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