第21题:[单选题]According to her letter, what action did Ms. Walter take? A.She called the company to complain B.She paid her bills by telephone C.She emailed her credit card company D.She sent payments for late fees 参考答案:B 第一段第四句中说,通过自动收费系统交付了费用,故选B。
第22题: [单项选择]可出现库瓦济埃征阳性的疾病是()。 A. 急性胆囊炎 B. 胆囊结石 C. 胆囊癌 D. 肝硬化 E. 胰头癌 参考答案:E 答案解析:胰头癌压迫胆总管导致胆囊肿大时无压痛,但有逐渐加深的黄疸,称库瓦济埃征阳性。