第11题: [单项选择]Passage Two Questions 29 to 31 are based on the passage you have just heard. A. They need more help from society and home. B. Their life is miserable and desperate. C. They can seek for a fresh start in life. D. They have both miseries and prospects. 参考答案:D 答案解析:[听力原文] What does the author think of unemployed people
第28题: [单项选择]年轻时(20~30岁)就可出现肺气肿的AAT个体表型为 () A. PiMM和PiMS B. PiMS和PiMZ C. PiMZ和PiSS D. PiSS和PiSZ E. PiZZ和PiSZ 参考答案:E 答案解析:AAT是血浆中重要的蛋白酶抑制物,具有多种遗传表型,其表达的蛋白质有M、Z和S型,人群中最多见的是PiMM型,占95%以上,若将其活性定为100%,PiSZ和PiZZ型活性只有35%和15%。这两种类
第29题: [单项选择]天疱疮的病理特点是 A. 出现上皮角栓 B. 出现结缔组织炎症细胞浸润 C. 出现上皮内疱 D. 出现上皮下疱 E. 出现基底细胞液化变性 参考答案:C