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问题 单项选择题 A2型题

患者，女，35岁。左腭部肿块2年，无痛性肿块、生长缓慢，表面黏膜呈浅蓝色，触诊为实性，无结节，压迫无退缩，无症状。最可能的诊断是（）

A.静脉畸形

B.黏液囊肿

C.黏液表皮样癌

D.多形性腺瘤

E.表皮样囊肿

答案

参考答案：C

解析：黏液表皮样癌患者女性多于男性，发生于腮腺者居多，其次是腭部和下颌下腺，也可发生于其他小唾液腺，特别是磨牙后腺。位于腭部及磨牙后区的高分化黏液表皮样癌，有时可呈囊性，表面黏膜呈浅蓝色，应与囊肿相鉴别。在手术中可以发现，肿瘤常无包膜或包膜不完整，与周围腺体组织无明显界限。有时可见面神经与肿瘤粘连，甚至被肿瘤包裹，但很少出现面瘫症状。

解答题

如图是人体内的气体交换过程示意图，据图分析下列问题：

（1）人体内的气体交换包括[A]肺泡内的气体交换和[______]______两个过程．

（2）①表示______（气体），②表示______（气体），两种气体通过______作用进行交换．

（3）外界气体进出肺泡是通过______实现的．肺泡内的气体进入毛细血管要经过______层细胞．
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单项选择题 案例分析题

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2处填上正确答案（）

A.valuable

B.appropriate

C.convenient

D.favorite
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