kokoboy7777 发表于 2010-5-11 09:35 
haha
Maybe itss useful,
its all risk to learn something, 
watchint the report waste ypur time cost, and 
learning it didnt mean it can increase your work ability,
think it and make the decision....
That's right.
Risk will be always exist when you are doing everything. However, if more information could be given, the risk will be reduced.