What's the distinction between the first and first?

first - ex. I won first place in the race. (You wouldn't use the word "the"  because it is unnecessary in the sentence)

the first - ex. My brother was the first person in the group chat.

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-SGO

the best practice

1. keep your workspace clean

2. wash your hands

3. seperate and clean chemicals and equipment

4.   use microfiber cleaning utensils

5. clean and sanitize all work surfaces

hope this !

is there a passage to this question if so plz take a picture