第12题: [单项选择]男性,65岁,进行性黄疸3个月,伴中上腹持续性胀感,夜间平卧时加重,消瘦显著。查体:慢性消耗性面容。皮肤、巩膜黄染。腹平坦,脐右上方深压痛,未及块物。Courvoisier征阳性。首先考虑的诊断是()。 A. 慢性胆囊炎 B. 胆石症 C. 原发性肝癌 D. 胃癌 E. 胰头癌 参考答案:E 答案解析:老年男性,进行性黄疸,消耗体征,Courvoisier征阳性,应诊断为胰头癌。慢性胆囊炎、胆石症很少有消耗症状。Courvoisier征阳性是指在胰头癌压迫胆总管导致阻塞时,发生明显黄疸,且逐渐加深,
A. changes in the forms of words B. changes in sentence structures C. changes in spelling roles D. words that have similar meanings 参考答案:A 答案解析:要根据上下文的信息判断单词的意思。文章在第四段中间首次提到inflection,之后和Modern English进行了比较,指出现在我们必须大量地依靠单词顺序和功能词来传达the older lan
第20题: [单项选择]A “full service” Loran-C receiver will provide(). A. matching pulse rates of at least 20 stations B. an automatic on-and-off switch C. a horizontal matching of all delayed hyperbolic signals D. automatic signal acquisition and cycle matching 参考答案:D