第4题: [单项选择]目前采用间接免疫荧光法检测患者血清中的dsDNA的最佳基质是 A. 马疫锥虫 B. 血吸虫 C. 利什曼原虫 D. 丝虫 E. 绦虫 参考答案:A 答案解析:[解析] 目前用于检测患者血清中的dsDNA的最佳方法是用马疫锥虫或绿蝇短膜虫作为基质进行间接免疫荧光法,因为这些血鞭毛寄生虫的虫体呈圆形或椭圆形,其动基体由纯净的环状dsDNA构成,除此以外通常不含
第7题: [单项选择]Which of the following is the best title for this article A. Countries and Their Money. B. Kinds of Money. C. Trade and Money. D. The History of Money. 参考答案:D 答案解析:[精解] 归纳题。文章最后一句"Money has had an interesting history from the days of shell money until today."实际上归纳