归纳题一题求解。。。

wwc008love

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

狂威雪

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

取巧

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。