Answer 1

准确的说是在绿卡申请批准的时候，如果你们的婚姻已经超过了两年，发放的绿卡将会是10年绿卡。

Answer 2

并不是申请婚姻绿卡的当天结婚超过两年就可以一次性拿到10年绿卡，而是拿到绿卡批准的当天，如果结婚已经超过两年，就可以直接申请永久绿卡。

移民局的官网上对这个问题是有解释的。

Your permanent residence status is conditional if it is based on a marriage that was less than 2 years old on the day you were given permanent residence. 

https://www.uscis.gov/green-card/after-green-card-granted/conditional-permanent-residence/remove-conditions-permanent-residence-based-marriage