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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1处填上正确答案（） 请在2处填上正确答案（） 请在3处填上正确答案（） 请在4处填上正确答案（） 请在5处填上正确答案（） 请在6处填上正确答案（） 请在7处填上正确答案（） 请在8处填上正确答案（） 请在9处填上正确答案（） 请在10处填上正确答案（） 请在11处填上正确答案（） 请在12处填上正确答案（） 请在13处填上正确答案（） 请在14处填上正确答案（） 请在15处填上正确答案（） 请在16处填上正确答案（） 请在17处填上正确答案（） 请在18处填上正确答案（） 请在19处填上正确答案（） 请在20处填上正确答案（）
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简述客票遗失的操作。
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鱼精蛋白副凝固试验是()凝血酶-抗凝血酶复合物是()优球蛋白的溶解试验是()
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一滚动轴承与轴径是过盈配合，则应选用（）装配此轴承。
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被置换的设备、管道在置换作业完毕后必须与系统进行（）。
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（）是对全校一学年的体育竞赛活动所作的全面规划和安排。
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信息系统的第一项相关活动就是获取那些有助于决策的数据。
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PNF操作技术中，拮抗肌动态反转目的错误的是（）。
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全球能源互联网的跨洲骨干架构主要由（）构成。