请教B2申请所需材料，
-Case by case depends on who will apply for the B-2. Read these links:
http://www.ustraveldocs.com/cn_zh/cn-niv-passporttrack.asp
http://www.ustraveldocs.com/cn_zh/cn-niv-typeb1b2.asp
该签证在国内申请所需时间
-Case by case.
及签证拿到后对入境美国时间的要求
-Any time within 10 years.
，谢谢！
-Case by case depends on who will apply for the B-2. Read these links:
http://www.ustraveldocs.com/cn_zh/cn-niv-passporttrack.asp
http://www.ustraveldocs.com/cn_zh/cn-niv-typeb1b2.asp
该签证在国内申请所需时间
-Case by case.
及签证拿到后对入境美国时间的要求
-Any time within 10 years.
，谢谢！
