第15题: [单项选择]The author implies that the use of mobile phones in such places as museums should be ________. A. limited B. expected C. discouraged D. recommended 参考答案:A 答案解析:观点态度题。文章第三段首句说Think twice before using mobile phones in elevators,museums,churches or other indoor p
第16题: [单项选择]下列哪种肝炎是主要通过消化道传播的() A. 甲型肝炎 B. 乙型肝炎 C. 丙型肝炎 D. 丁型肝炎 E. 自身免疫性肝炎 参考答案:A