感谢大家帮助。我是在CIC网上看了以下陈述才来求证的 # r; _. o7 c/ k3 ]3 ]$ d8 s + S0 P3 {) t6 s" iIf you leave Canada and want to return, you must have:( Z I( V4 W8 K4 ^3 E* B/ X2 H
y& _$ p/ O1 I9 m- U( N. {a valid passport or travel documents 6 l9 q( y; v4 y% ?4 y1 xa valid study permit if you are returning to study in Canada and$ K7 _5 \% K/ D; \5 q8 [7 Y
a valid temporary resident visa if you are a citizen of a designated country for which Canada requires a visa. R6 v8 S: _* N* _; U0 g/ z
If you are a citizen of a designated country and you travel to a country other than the United States, Greenland or Saint-Pierre et Miquelon, you will need a multiple-entry visa to re-enter Canada. If your temporary resident visa has expired or if your visa was only valid for a single entry, you must re-apply for a temporary resident visa at a Canadian visa office outside Canada before you can re-enter Canada.
I remembered I saw this policy somewhere before... r5 O, H0 I1 |- U9 t4 A0 V8 m % l% d: I% S `Maybe someone can call CIC 1888-242-2100 for confirmation.