A. can be used to replace a flat tire B. provides a kind of temporary support to the flat tire C. is capable of moving as quickly as a wheel D. is as flexible and durable as an ordinary wheel 参考答案:B 答案解析:[试题分析] 本题测试对文中所叙事实的理解。 [试题详解] 本题要求读者总结出急救轮胎的主主要功能,应为B,即急救轮胎是一种暂时性的,支撑漏气的轮胎的装置,而不是A(代替漏气轮胎的装置), C(