2.我的冻结30W是我和母亲3月份通过中国银行存单存款存入的,并没有定期存在银行的记录,平时都是流动用来理财等的。这是否有关系?是否需要解释?
as far as I know, SDS does not require 定期, you don't need to explain anything.
3.我母亲的工资用来提供30多W的资金证明是否合理?(可这确实是个人存款啊。。。中国朋友爱理财,外国朋友应该知道吧?。。。)
30W from savings is reasonable. "中国朋友爱理财,外国朋友应该知道吧" is NOT reasonable.
4.房产证那样的情况到底是否提供为好?
I do not suggest provide home ownership. That house belongs to your mother, not you. From a Canadian point of view, it has nothing to do with your study in Canada.