标题: 请教各位Only when后面的内容是充分条件么? [打印本页] 作者: chenxuleon 时间: 2010-11-4 15:34 标题: 请教各位Only when后面的内容是充分条件么? Rt,127. Anthropologists assertthat cultures advance only when independence replaces dependence.是independence—>culture adavance吧?feifei里的是写CA——>independence,应该是哪一种呢?请教各位,谢谢! 作者: LeoBX 时间: 2010-11-5 22:34
是必要条件。 只有独立了才有cultures advance ,不代表独立了就一定有cultures advance ,cultures advance 建立在独立的基础上,因此independence为必要条件。作者: sdcar2010 时间: 2010-11-6 06:24
The phrases (then, only, only if, only when, must, required, unless, except, without, until) introduce a necessary condition.
The phrases (if, when, whenever, every, all, any, people who, in order to) introduce a sufficient condition.作者: chenxuleon 时间: 2010-11-6 18:38
恩好的,谢了!作者: chenxuleon 时间: 2010-11-6 18:39
very useful, thank u all !