D: in the absence of the 25 percent tax credit,business spending for research
and development after 1981 would not have been substantially lower than it was.
请问这句话什么意思.到底是什么和什么在比较呀?作者: lisaislisa 时间: 2002-12-10 15:22
it comparies the situation in which 25% tax credit exists with the situation in which it does not ( or absent)
the Problem is asking for an 'assumption'
^^作者: yiyi20 时间: 2002-12-10 16:47 标题: 请问
it was是指absentce 25%的情况还是存在25%的情况
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