标题: 归纳题一题求解。。。 [打印本页] 作者: wwc008love 时间: 2011-5-17 22:24 标题: 归纳题一题求解。。。 A package is never accepted for delivery by the delivery service unless it is within the established size limits.All packages accepted for delivery by service have a return address. If the statements above are true,which of the following must also be true? A The delivery service charges more for heavier packages than for lighter packages B The delivery service will always accept for delivery a package that is within the established size limits C If a package is within the established size limits and has a return address,it will be accepted for delivery by the delivery service no matter how heavy the package is. D A package that is not within the established size limits but has a return address is never accepted for delivery by the delivery service. E The delivery service does not charge for packages that must be returned to the sender
答案是D,逻辑理不清楚，请求各位大虾帮忙作者: 取巧 时间: 2011-5-17 22:37
先看第一句within the established size limits是accepted for delivery的必要条件，这种句式一定要读书
这道题的关键是掌握必要条件
没有满足within the established size limits，就没有accepted for delivery。作者: 狂威雪 时间: 2011-5-17 23:37
must be true 的意思是，根据原文意思一定是对的，A 重的货物比轻的货物收费多。原文推不出来。b物流公司总是接受在规定规格以内的货物，（错，因为如果没有写退回的地址，它也不收）C既符合规格又有地址，多重都接受（错，文中没提及重量的收费）D（不在规格范围内，但有退回地址，不接受）正确，原文中规定尺寸就是接受的必要条件，如果这个不行，肯定不接受。E没有收钱的货物一定退回去。文中没有信息支持