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

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。

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