第13题: [单项选择]慢性胃炎患者的实验室检查异常,错误的是() A. 胃液分析时多灶萎缩性胃炎患者胃酸正常或增多 B. 自身免疫性胃炎患者胃酸缺乏 C. 自身免疫性胃炎患者血清促胃泌素水平常明显升高,伴恶性贫血时更甚 D. 慢性胃炎患者血清中可测得抗壁细胞抗体和抗内因子抗体 E. 多灶萎缩性胃炎患者血清促胃泌素水平升高 参考答案:E
第18题: [单项选择]Jeans, originally designed by Levi Strauss, ______. A. have become a symbol of the fashionable class B. have come to symbolize changes in social attitude C. are suitable wear for rough work only D. are no longer so popular as they used to be 参考答案:B 答案解析:根据原文第一段最后一句,Furthermore,these pants have come to symbolize changes in social attitude(更进一步地说,牛仔裤已象征了