在本句中，I 是可以明確感知她的憤怒的，只能用Could。might 的程度太輕。
關於could 和might 的用法壹下給出詳解：
用於疑問句表示請求時，壹般只用Could,且可用於各人稱。如：
Could you help me explain the difference between "might" and "could"?
Could I use your mobile phone a little while?
上句可用May代替：May I use your mobile phone a little while?
用Might也是可以的，但不常見。
2. could和might都可用在條件句中，表示假想的情況。表示“本來會、本來可以/能夠”。例如：
If you tried you could/might do the work better. 如果妳試試的話，準能把那項工作幹得更好。
You could have met her if you had gone that way. 如果妳走那條路的話，妳準能遇見她。
此句中的could如改成might則表示：……，妳也許能見到他。
They could/might have worked it out if they had asked me for help. 如果他們來向我求助的話，他們本能夠做出來的。
He could/might have give the answer, but he refused to. 他本來能夠回答的，但他拒絕這麽做。
You were stupid to go skiing there — you could have broken your leg. 妳真笨，竟會到那地方滑雪。妳本來會摔斷腿的。
上面的例句中用might則因其語氣較輕而語意效果不甚理想。
在此場合，could和might的區別是could較might的可能性強。
3. couldn't be + 比較級句型不能用might代替。如：
Their lifestyles couldn't be more different. 他們的生活方式極為不同。
4. could和might都可用在表示“結果”的狀語從句中，同樣，could語氣較重些。例如：
He expressed his ideas clearly so that the average person might understand. 他把他的意思清楚地表達出來，以便壹般人能聽明白。
5. might as well表示“不妨、可以、倒不如”，此時的might是不能用could代替的。例如：
We might as well look for some food now. 現在我們不妨找些吃的東西。
I expect I might as well be going. 我希望我可以走了。
Since it’s a fine day we might as well walk. 既然是壹個晴朗的天，我們不妨步行。
We might as well have gone home as you suggested. 我們還不如按妳建議的回家去呢。