What punctuation mark is used twice in a Spanish sentence?

The punctuation mark used twice in a Spanish sentence is the exclamation point (!).

Here's how it works:

* Single exclamation point (!): Used at the beginning of an exclamatory sentence.

* Double exclamation points (¡¡ !!): Used at the beginning and end of an exclamatory sentence.

Example:

* ¡Qué hermoso día! (What a beautiful day!)

Notice how the exclamation point appears twice in the sentence.