充分必要条件指示词

mjiirggh

1.introduce a sufficient condition: if/when/whenever/every/all/any/people who/in order to/to

2.introduce a necessary condition: then/only/only if/must/require/no,none(在句子开头)

3.unless equation: unless/except/until/without(其后面部分变成必要条件，其它加NOT变充分条件)

4.特例：the only way to achieve success is to work hard. achieve success(充分条件)

only a professional consultant can solve the organization’s problems. a professional consultant(必要条件)

no citizen can be denied the right to vote. denied the right to vote(充分条件). no citizen(必要条件)

topway5

ding

"no citizen can be denied the right to vote. denied the right to vote(充分条件). no citizen(必要条件)"

??? 不懂。

I would say "citizen" is a sufficient condition for "right to vote".

lakegirl

以下是引用topway5在2004-11-14 19:49:00的发言：

ding

"no citizen can be denied the right to vote. denied the right to vote(充分条件). no citizen(必要条件)"

??? 不懂。

I would say "citizen" is a sufficient condition for "right to vote".

这句话确实有些问题，我也挺糊涂的。不管它啦。几个理论总结的还是蛮不错的呢