主题：2007年美国个人收入所得税 -- 沉宝

sorry can't type Chinese.could u pls elaborate this sentence:

"如果在过去三年中，你在美国的身份中有除签证F、J、M、Q以外的成分的话，请仔细计算是否合乎居民身份报税的要求。 "

do you mean it's more likely to file as resident if one has a visa other than "FJMQ", or the other way arround?

I heard that for tax purpose only, a F1 student w/ no less than 183 day presence in US last tax year can file as resident, is that true?

Thanks in advance!