“??????±ù??????”??????·???“????????”??“????????”??“????????”????±ù????????????·?????±í?ó????“????????”????±ù?????????×??·??????±??????“????????”????±ù??????????“????????”?ò??±ù???????ó??·????ü?????????????§???§??????°???????×????????????????????????????????????ò?±???????????????????????????????????????ú?á???????ù???????????§????????????
?ù???????ù??????????±?????????????“????——????????”?????§?í???????????§?ú?????????????é??·????¨???????????????????????????§?ú?????????????????????ù?????????ó?????????¨?????????????????????????à????????????
±?????????????????????×????????ê?????ó?????????????§?ü?????????ê???¨?????§·????????????¨???????§?ü??????????×÷???????????á??·???——?????à?????§?ü???????????????à??????????????????°??????í????????????
???§?ú???§?°???¤·????¨?????±?ò????????×÷??×é??±????é????????°????????????°?????§?°???????????¨????±????é???????è???????????§?ú?????????????é???ú?ú???????????????????????±?????????¨???????°???§?ü????“?ü”×???×????????????????????é???????????????????????¨???????§?ú?????×???????????????à??×÷??????·??????????????§?ü??“?ü”×???×??????????????????ü?????????ú???§?ú?ü????????????×÷????????????
????×????á?????????§?ú??????????????????????????×÷??·???????±??????§?ú??????“???§±?????????????????????×÷???????ú???í????×÷????????????×÷??·?????×???”?????§??????
?????ù?????????á?????§?ú????×????????????§?ú????“21?????????ó???§????”????????????±???“???????§????”??????????????????????????????????????“???§?ü”????×??ü????×??????ì???è???????????????????ê???????????§?ü?????????????¨??????????×????????§?ú??????±????????????????????á???§?ü?????§·????????????????????????????¤???§?ú?????????????????????§??·???×???×??????±?×?????à???????????§???÷??????
???ó??????·?×???????????——???????????????????????????á???????????§?ú??????×??á??????????????×??÷?????????¨???á??·????á?????§?ü???????????????????????????????????????????à??×÷??·???——??×??ü??
??·??????????????????????????????????????ù????????±????????????????????????????í?????????????????à??×÷??——?????ü???¨????±??????§?ú????“????????????×÷??????????±???????????·?”????????
±????????????ù???????×??????????????“??????????????????”???????????????ò??????????????±ù???????????±???????????í?????????????????????????????????è?????§?????????á???????è?????????????????????????§?ú???????????????±??×??????????????????????????ù????????????????????????±í?????à?????§?ú?§?á?????????????°·??????í???é??×??á?????????????ì?§?ú?ò???§·??????ì?ò?????????¤???§?ú?????§????????±??ú???????ì??????

从从化学键角度分析化学反应实質键的角度看从化学键角度分析化学反应实质反应的实质是“旧从化学键角度分析化学反应实质键的断裂新从化学键角度分析化学反应實质键的形成”，下列既有旧从化学键角度分析化学反应实质键的断裂又有新从化学键角度分析化学反应实质键的形成的变化是（　　）