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【简答题】
Good evening, ladies and gentlemen! First of all, I would like to ______(20) a sincere welcome to you all, the new comers of our company. As you know, our company is one of the top 50 companies in the country and has a long history of more than 100 years. I think you must ______(21)being a member of such a great company. But we can not ______(22)tradition alone. W need new employees with new knowledge and creative _____(23). I would like to welcome you _______(24), and from today, let's begin to work together.
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【多选题】关于城市生态位的论述正确的是( )。
A.
城市生态位是一个城市或任何一种人类生境给人们生存和活动所提供的生态位
B.
城市生态位可以分为资源利用生态位、生产条件生态位、环境质量生态位，生活水平生态位四大类
C.
城市生态位是指城市满足人类生存发展所提供的各种条件的完备程度
D.
城市生态位比生物生态位要窄
【简答题】城市生态位
【简答题】城市生态位