"这个是加拿大移民局的问答,各位朋友看看只去美国是不是不需要多次签的意思?single-entry temporary resident visaif you have a single-entry temporary resident visa, you will generally need a new single-entry visa to come back to canada. you can request to return to canada on your original single-entry temporary resident visa, if: you will only visit the u. or st. pierre and miquelon; and you will return to canada before the end of your approved stay in canada. "