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In this method, language is learned by constant repetition and the reinforcement of the teacher. A. audio-lingual B. grammar-translation C. direct D. communicative 查看完整题目与答案 图示电路中,电压相量 =50 ∠ 30°V ,阻抗 Z =3+j4Ω ,则电路中的电流相量 为( )。 A. 10 ∠...