Calcium levels in the blood are regulated by A: positive feedback mechanism. B: negative feedback mechanism. C: neither positive or negative feedback. D: both positive and negative feedback.

Listen to the dialogue about giving feedback. Q: What does the man say about giving feedback?

Find out the feedback path in the circuit shown in the figure and which is positive feedback.[img=1011x700]1803a2b4bd54568.png[/img] A: A B: B C: C D: D

Find out the feedback path in the circuit shown in the figure and which is only ac feedback.[img=1011x700]1803a2b4bfbe0ef.png[/img] A: A B: B C: C D: D

Check off the items when you have completed them: A: I wrote my haiku B: I posted my poem to the forum for feedback. C: I gave feedback to two of my peers on their poems.

To get a current-voltage conversion circuit, () should be introduced in the amplifier circuit. A: current-series negative feedback B: current-shunt negative feedback C: voltage-series negative feedback D: voltage-shunt negative feedback

which variable will be measured in the feedback control?______ will be measured in the feedback control.

反馈（feedback）

Effective feedback is well timed so that the employee can (easy) ____________ connect the feedback with his actions.

对于一个单位正反馈系统,开环传函为G,其闭环系统的模型为() A: feedback(G,1,-1) B: feedback(G,1,1) C: feedback(G,1) D: feedback(G,-1)