不用大寫，看下面的例句
1.冒號用於對後面內容的介紹或解釋，如 This is her plan: go shopping.
2.冒號用於名單之前，特別是一個豎排的名單。
We transferred three employees to new branches:
" Tony Wang to New York City
" Mike Jackson to Tokyo
" Mark Foster to Paris
當名單橫排的時候，冒號要用在一個完整的句子之後，如 We need seven people: three students, three engineers, and a professor.
3.冒號用於一個正式的引用之前。如 The professor said: “It was horrible.”
4.冒號也可用於商業或正式信函的稱謂後面，如 Dear Mr. Lee:(美國英語中，信件或演說詞的稱呼語之後用冒號，而在英國英語中多用逗號。)
5.冒號用於數字時間的表示，如16:45 或 4:45 p.m.
6.冒號用於主標題和副標題之間，如 Web Directory: World and Non-U.S. Economic Data
不用大寫，看下面的例句
1.冒號用於對後面內容的介紹或解釋，如 This is her plan: go shopping.
2.冒號用於名單之前，特別是一個豎排的名單。
We transferred three employees to new branches:
" Tony Wang to New York City
" Mike Jackson to Tokyo
" Mark Foster to Paris
當名單橫排的時候，冒號要用在一個完整的句子之後，如 We need seven people: three students, three engineers, and a professor.
3.冒號用於一個正式的引用之前。如 The professor said: “It was horrible.”
4.冒號也可用於商業或正式信函的稱謂後面，如 Dear Mr. Lee:(美國英語中，信件或演說詞的稱呼語之後用冒號，而在英國英語中多用逗號。)
5.冒號用於數字時間的表示，如16:45 或 4:45 p.m.
6.冒號用於主標題和副標題之間，如 Web Directory: World and Non-U.S. Economic Data