第24题: [单项选择]总线的______包括总线的功能层次、资源类型、信息传递类型、信息传递方式和控制方式。 A. 物理特性 B. 功能特性 C. 电气特性 D. 时间特性 参考答案:B 答案解析:[解析] 物理特性是指总线的物理连接方式，包括总线的根数，总线的插头、插座的形状，引脚线的排列方式等。 功能特性描述总线中每一根线的功能，即总线的功能层次、资源类型、信息传递类型、
第25题: [单项选择]磺酰脲类最常见的是 A. 皮肤过敏 B. 胃肠道症状 C. 低血糖 D. 乳酸性酸中毒 E. 水肿 参考答案:C
第27题: [单项选择]Which of the following are true of the first metal coins A. They were made of copper. B. They were made of paper. C. They were square but with a round hole in the center. D. They were round but with a square hole in the center. 参考答案:D 答案解析:[精解] 细节题。关于最早的金属钱币的描述出现在文中第三段第二句"They were round and had a square hole in the center．"中，这与[D]的描述完全一致
