There are no difference between who you are and what you are. You need to provide the source of funding. Same as you were in China.
我隨先生一起申請F2是否風險比他自己一個人申請F1風險要大一些?
once he has the F1, you can apply F2 at the Airport.
如果我不申請F2還有其他簽證可以隨夫進入美國嗎?也就是說是否不需要簽證,加國公民可以自由進出美國?謝謝。
yes you can go many times, but only 182 days a year.