题目True or False (total6question,12.0score)4. (2.0score) GaAs、GaN都是第二代半导体材料A. TRUEB. FALSETrue or False (total6question,12.0score) 4. (2.0score) GaAs、GaN都是第二代半导体材料A. TRUEB. FALSE题目解答答案B. FALSE