美国留学可以同时套同一个系多个老师吗？

绝不可以。同一个系绝不可以同时套多个老师，这个是很早的定论了。很早之前，清华BBS上，就有贴出一位教授原话“I recently had a Chinese student tell me that I was her dream advisor, later to learn that she was saying the same thing to professors throughout our department and even other departments.”同一个系，建议先套第一个，如果没有回复的话，可以等1-2周再套第二个，这样如果被发现了，也好解释——我以为你对我不感兴趣什么的。