Don’t try to please your boss. Just do your work and always try to do little bit more than what you suppose to do. No one likes to be shouted at in a working environment. It says a lot about your boss. She needs to take some classes on how to deal with employees, and shouting at them is not one of them. When she acts this way again, nicely tell her you are trying your best and ask her why she is shouting at you. If she gives you some demeaning answer, find another job. You don't have to put up with that.