E is saying that there IS a group of people that can finish complex jobs in One time without rework--->contradict to the original message:
"there is clearly a level of focused concentration that complex repairs require that is elicited more reliably by rework jobs than by first-time jobs." --says because works are so complex that it is more reliable to do it again!! therefore in A--saying that both 1st time and 2nd time workers are no different in skills makes sense
修理篇：原推理提到 When initial repairs are inadequate, therefore, it is not because the mechanics lack competence，
将选项取非，如rober所说，‘If say, members of group A who do the first-time repair are mostly newbies, and members of group B who do the rework are more experienced, then the author's conclusion would be render false. ’这就反对了原结论。
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发表于 2005-10-12 11:41:00
