单项选择题

若放大电路的负载固定,为稳定输出电压,可以引入电压负反馈,也可以引入电流负反馈。 A.
√; B.
×。

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单项选择题

Compared with active voice(主动语态), whichof the following statements is not the typical feature of passive voice (被动语态)?

A．More concise
B．Emphasizing the recipient of the action
C．More objective
D．More indirect

Nine components of communication are source, message,encoding, channel,
receiver, decoding,feedback, noise and context.

答案：正确