回复：谢谢, 我被感动了.

1, 一般来说,从申请递交上去,到批准,大概多少时间(极端例子不算);
It took us 2 years. Now it might take longer.

2, 移民纸来了以后,多长时间可以登陆?
It is within 1 year after you did your physical exam. For example, if you do your physical exam on August 13th, 2007, your immigration visa will expire on August 12th, 2008.
3, 如果我要到加拿大大学做博士后,对方提供证明,是否可以算在加拿大"居住"?
Yes. But to able to keep Canadian PR, you have to stay there 2 years in each 5 year after you land.

Hope that helps. Good luck.