题目内容
最常见的两种癌胚胎抗原是________和_______。
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经过10年的艰苦创业，李先生的腾达集团已具备了坚实的竞争实力和根基，并考虑更高层次的发展。目前公司总资产3亿元，年销售收入4亿元，年净利润5000万元，并且销售收入和利润正以年平均15%的速度递增，虽然拥有着高增长速度，但是市场份额仍需提高。 制药业和轻工业是集团的两大支柱产业。制药公司设备先进并拥有数个基本类药物但目前缺乏新、特药品种，加上近几年国家出台相关政策法规来规范制药行业，遏制药品的高价出售，这对药品的利润空间产生了很大的影响。 轻工方面市场需求增长很快，产品严重供不应求，但该行业市场进入壁垒较低，生产厂商众多，竞争激烈。 公司目前的困难直接体现在：融资困难，公司有非常具市场前景的项目以及厚实的企业基础，但作为民营企业其融资渠道缺乏，资金问题已成为企业发展的瓶颈;人 员问题，公司中随同李先生创业的元老们忠诚有余但不具备现代企业管理能力和素质，但要更换他们也很为难，且公司的人才引进、培训、激励机制尚未建立，使得人才的匮乏问题一时内难以突破。 李先生意识到企业今后竞争的残酷性和紧迫性，他必须在短期内完成企业向现代企业的转型，完成对老企业的改造，确立更明确的战略发展思路，迅速壮大企业规模，为此他希望在相关方面着手进行企业变革，使企业在更高的层次能有进一步的发展。 要求：
原子发射光谱与原子吸收光谱产生的共同点在于（）。
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3处填上正确答案（）
休闲辅导的最终目标与学校教育目标存在本质的差异。
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