题目内容

商业银行经营的三原则是、和__。

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You will hear 8 short conversations. After each conversation, there will be a recorded question. After each question, there will be a pause of 10 seconds. The conversations and questions will be spoken twice. When you hear a question, you should decide on the correct answer from the 4 choices marked A, B, C and D.[音频]

A. To travel.
B. To teach.
C. To work.
D. To study.

电子商务业务模式？

广义的电子商务与狭义的电子商务的定义？

RLC串联电路的总电压( )

A. 等于各元件电压的代数和
B. 等于各元件电压的相量和
C. 一定比各元件上电压高