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Question: If I master the full set of photolithography machine technology, can I keep my research? Answer 1: Brother, I feel sorry for you. What makes you so cautious in your dreams? Answer 2: In the interview room for the master's entrance examination, you can ask your doctoral supervisor to let you in. Answer 3: Postgraduate entrance examination? Be bold! You can open a 985 university wherever you are. Answer 4: Go away, my urine is yellow.