回答如下：1. Hello 2. Hi 3. Good morning 4. Good afternoon 5. Good evening 6. How are you? 7. How's it going? 8. What's up? 9. What's new? 10. Nice to meet you 11. Hey 12. Greetings 13. Salutations 14. Hey there 15. Yo 16. Howdy 17. Hiya 18....
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