八爪鱼的爱情
幼苗
共回答了11个问题采纳率:100% 举报
我见过的这道题与您的题有出入,Over a very large number of trials,the probability of an event's _____ is equal to the probability that it will not occur.因为event's 后用的是动名词,因此选A.如果按照您的题,我个人认为答案应该是B.动词不定式做定语,相当于 that will occur,与后面的that it will not occur想呼应,表示未发生的事,而您的句子如果选A,为现在分词做定语,往往表示正在进行,与此句不符合.
1年前
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