-
题目： 单选题读甲、乙两幅图，从3月21日到6月22日前后，此时期（）
A地球运行在甲图公转轨道上的③段上
B太阳光直射点移动在乙图的a段上
C北极圈上出现极昼现象
D地球公转速度逐渐变快
答案不对？请尝试站内搜索
推荐知识点:
- 土方、泥浆的堆臵和外运费列入（）内计算。
- 以下关于解除专业关系的说法错误的一项是（）。
- 食品生产企业应当建立食品出厂检验记录制度，查验出厂食品的检验合格证和安全状况，并如实记录食品的名称、规格、数量、生产日期、生产批号、检验合格证号、购货者名称及联系方式、销售日期等内容；食品出厂检验记录应当真实，保存期限不得少于（）。
- 物料提升架的进料口设在提升架最下层（），出料口设在每层楼的（）。
- 治疗小儿风寒感冒的首选方剂是（）
- 简述消化性溃疡的药物治疗。
- 简单化油器在转速一定时，随节气门开度由小变大，混合气成分表现为由（）
- 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（）
- “秘书应以从事文字工作为主”的定义，属于（）
- 项目的各级检验与评定过程，要求（ ）。