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4～8岁时，脊柱椎体与椎弓愈合，开始为______，最后为_______和________。
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当脚手架下部暂不能设连墙件时可搭设抛撑。抛撑应采用通长杆件与脚手架可靠连接，与地面的倾角应在45°—60°之间；连接点中心至主节点的距离不应大于300mm。抛撑应在连墙件搭设后方可拆除。（）
母兔产下10余只仔兔应在什么时候进行淘汰？
某县行政中心主楼工程经有关部门批准，由政府投资兴建，该工程属于县重点建设工程。项目规模约为35000m2;地上12层、地下2层;总投资约3000万元人民币，建设地点位于该县新政务区。建设单位通过公开招标的方式选定了一家具有施工总承包一级资质的施。[企业为中标单位，并与其签订了工程总承包合同。为了保证该项目能按双方的约定顺利启动实施，开工前，承包单位作了详细的施工实施规划，内容包括： (1)工程概况;(2)施工部署; (3)施工项目组织构架;(4)施工进度计划; (5)劳动力供应计划;(6)施工准备工作计划; (7)施工平面图;(8)技术组织措施计划; (9)文明施工及环境保护规划;(10)项目通信管理; (11)技术经济指标分析。
From childhood to old age, we all use language as a means of broadening our knowledge of ourselves and the world about us. When humans first 1 , they were like newborn children, unable to use this 2 tool. Yet once language developed, the possibilities for human kind’s future 3 and cultural growth increased. Many linguists believe that evolution is 4 for our ability to produce and use language. They 5 that our highly evolved brain provides us 6 an innate language ability not found in lower 7 . Proponents of this innateness theory say that our 8 for language is inborn, but that language itself develops gradually, 9 a function of the growth of the brain during childhood. Therefore there are critical 10 times for language development. Current 11 of innateness theory are mixed, however, evidence supporting the existence of some innate abilities is undeniable. 12 , more and more schools are discovering that foreign languages are best taught in 13 grades. Young children often can learn several languages by being 14 to them, while adults have a much harder time learning another language once the 15 of their first language have become firmly fixed. 16 some aspects of language are undeniably innate, language does not develop automatically in a vacuum. Children who have been 17 from other human beings do not possess language. This demonstrates that 18 with other human beings is necessary for proper language development. Some linguists believe that this is even more basic to human language 19 than any innate capacities. These theorists view language as imitative, learned behavior. 20 , children learn language from their parents by imitating them. Parents gradually shape their child's language skills by positively reinforcing precise imitations and negatively reinforcing imprecise ones. 请在10处填上正确答案（）
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