A. sailors thought the world was flat B. the man who made maps had seen one-eyed monsters C. easily sailing ships were made of metal D. the water in the sea was boiling a long time ago 参考答案:A 答案解析:推理题。文章说到当时人们害怕向东或向西航行,因为他们认为他们会从地球上掉下去,由此可推知他们认为地球是平的。因此选[A]。
第26题: [单项选择]脓腔的冲洗 A. 硼酸+硼砂 B. 硼酸 C. 硼酸+硼砂+氟化物 D. 氯化物 E. 硼砂十氟化物 参考答案:A