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在我国内地推出存托凭证是上海证券交易所推出（）市场的备选方案。
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测定氮元素的ARL－MA及ARL4460光谱仪采用()真空系统，由初级泵()和次级泵()组成。其中()的转速达()转／分钟，其完全停止需要5分钟以上的时间。
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比表面积
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普通处方的保存期限是（）
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交换机是一种基于MAC地址识别，能完成封装、转发数据分组的网络设备。()A.正确B.错误
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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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亲缘选配
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预防动物传染病的根本原则是什么？
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下列各项中，属于会计核算软件应当提供的控制功能的有（）。
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系统噪音测试的测点高度距离地面应为（）m。