A. invented modern mathematical applications B. were interested in navigation C. were unaware of the value of their studies D. worked with electricity 参考答案:C 答案解析:[试题分析] 本题考查学生捕捉具体信息和分析问题的能力。 [详细解答] 从文中"If the Greek mathematicians had not applied themselves to
第25题: [单项选择]In order to show his boss what a careful worker he was, he took {{U}}extra{{/U}} trouble over the figures. A. extensive B. spare C. additional D. supreme 参考答案:C 答案解析:extra意为“额外的,外加的”,additional意为“另外的,附加的”,两者意思相近。选项A.extensive“广大的,广博的,广阔的”;选项B.spare“空闲的;多余的,剩下的,备用的,节