【多选题】【消耗次数：1】
人类面临的共同挑战包括（ ）。
①
重大传染病
②
气候变化
③
贫富分化日益严重
④
网络安全
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Wow. That’s a marvelous room. I’ve never known you’re so artistic!____________
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Don’t mention it.
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④
Can I help you?