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题库 / Prep2007E2-CR-19
With a record number of new companies starting up in Derderia and with previously established companies adding many jobs, a record number of new jobs were created last year in the Derderian economy. This year, previously established companies will not be adding as many new jobs overall as such companies added last year. Therefore, unless a record number of companies start up this year, Derderia will not break its record for new jobs created.
Which of the following is an assumption on which the argument relies?
Each year, new companies starting up create more new jobs overall than do previously established companies.
Companies established last year will not add a greater number of jobs overall this year than they did last year.
This year, the new companies starting up will not provide substantially more jobs per company than did new companies last year.
This year, the overall number of jobs created by previously established companies will be less than the overall number of jobs lost at those companies.
The number of jobs created in the Derderian economy last year was substantially larger than the number of jobs lost last year.
又选错了b
b是重复了前提句：---注意这种重复前提的错误
This year, previously established companies will not be adding as many new jobs overall as such companies added last year.
。。
实际上，新工作总量=新公司*新公司的平均工作需求量，原文之考虑了前者
所以原文的前提（answer）是新公司的平均工作需求量不会高于去年（C）
所有的job＝nb new companies ＊nb of new jobs at new companies ＋news jobs at previous companies,
想要X＊Y + Z更大，Z减少了，就需要X＊Y更大。结论说除非X增加，否则总量不会增加，但其实要是增加Y也能增加总量
新公司增多→就业机会增多
Assu搭桥（削弱他因CQ1）OR（增强因果链条）
C、每个新公司提供的职位不会增加，CQ1，correct
Assu搭桥（削弱他因）OR（增强因果链条）
C说明如果每间新公司提供的工作不如去年的新公司多的话，那肯定需要提高新公司的数量才可以有破纪录的total number。number of companies 和 record job created 中间就差个 job per company
正确C。原文 新开+原来 提供的job，已知原来提供的jobs少了，+assumption（新开的提供jobs没有多）→结论：除非又新开了，jobs才会多（可理解为不变状态下，jobs少了）
今年：旧公司不提供去年那么多的新工作；_______________________________ --------出现比去年更多的工作岗位
缺条件，题目认为建立很多新公司就是那个条件。题目要求找出这个推论成立的前提条件
C：每个新公司提供的就业岗位都没有去年每个新公司提供的多 ------ 如果每个新公司提供比去年更多的工作岗位，那就不需要新建那么多新公司了
This year, previously established companies will not be adding as many new jobs overall as such companies added last year.
such companies指代previously established companies，such companies added jobs last year，那么意味着这些公司至少是前年开立的，去年开立的公司不包含在里面。
This year, previously established companies will not be adding as many new jobs overall as such companies added last year.
为神马去选b。。。。
choice c, 今年每一个新公司不会比去年的每一个新公司提供更多的岗位。取非就是会提供更多，因此weaken conclusion
问题转换成了要保证‘今年成立新公司岗位> 去年成立新公司岗位’的assumption是什么
今年新增岗位= 今年成立的新公司岗位+去年成立公司岗位+ 前年以及更早的公司岗位
关键在于看懂'This year, previously established companies will not be adding as many new jobs overall as such companies added last year'，即‘去年成立公司岗位+ 前年以及更早的公司岗位
由于在今年，之前创立的公司不会像去年一样建立那么多岗位。
除非今年有破纪录数量的新公司创立，否则今年新增工作岗位数量将不会创纪录