A. The fast pace and complicated way of life. B. Too much leisure time. C. Loose relationship between people. D. All of the abov 参考答案:C 答案解析:[关键词语] more pessimistic(更加悲观) [详细解答] 文中关于使美国人悲观的原因有好几点,如第六段中提到“Because of the complex way of lif
第4题: [单项选择]对膀胱结石的诊断最可靠的是() A. 有血尿 B. 膀胱镜检 C. 尿路刺激征 D. 膀胱区B超检查 E. 排泄性尿路造影 参考答案:B 答案解析:膀胱镜检可直接窥查尿道及膀胱内有无异常。