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Although recent years have seen()reductions in noxious pollutants from individual motor vehicles, the number of such vehicles has been steadily increasing.
摆式仪测试中,发现橡胶片出现()情况时,应更换橡胶片。
You want to implement a master-detail relation between data blocks based on object tables. How would you do this? ()
为什么说地球的大气圈、水圈和生物圈既是互相区别和相互独立的,又是相互作用的?
径流系数a
根据ZBT35001-87规定,汽车电气系统采用()时必须统一,电源为()搭铁。
以下哪一种不属于清洁能源?()
在组织结构图中,不能添加上司
妊高征孕妇头痛剧烈伴呕吐时首选药物是()
( )是旅游业最为重要的理念,良好的服务意识是优质服务的基础和根本。
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