那到时我怎么证明我在美国呆满了一年？
-It is staying outside US for one year. When you leave US, you need to provide the I-94 card to the airlines (USCIS), then USCIS will know your leaving. Whne you come back, USCIS will have your new record.
呆满一年是呆满整的一年还是可以分段加起来呆满一年？
-You can make a short break such as less than one month by entering US during the year and 可以分段加起来呆满一年. If you enter US and stay too long, you have to recount it again (not)可以分段加起来呆满一年. This depends on USCIS judgement.
