如图所示的电路中，闭合开关，滑动变阻器滑片向右滑动的过程中 _爱下问搜题

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问题选择题

如图所示的电路中，闭合开关，滑动变阻器滑片向右滑动的过程中

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A．灯泡L₁变亮、L₂亮度不变

B．灯泡L₁变亮、L₂变暗

C．灯泡L₁亮度不变、L₂变亮

D．灯泡L₁变暗、L₂变亮

答案

答案：D

补全对话，情景问答

给下列的问句选择答语。

( ) 1. Does a lion have a trunk?
( ) 2. Where does a fish live?
( ) 3. What do giraffes eat?
( ) 4. What can a cow do?
( ) 5. Where is Danny?

a. He is under the desk.
b. It can walk.
c. In a river.
d. No, it doesn't.
e. They eat grass.

问答题论述题

控制器的设计应符合哪些要求？