如图所示电路，灯泡L的灯丝电阻和电源电压均保持不变．闭合开关S后，当滑动变阻器的滑片P位于ab中点时，灯泡L恰好正常发光；在滑片P向b端移动的过程中，你将观察到的现象有：（1）_____；（2）_____．

.Mr. Brown has a strange way of writing. This is a notice from him, but no clear ______ of what he has written can be made at all.  

A．explanation

B．sense

C．meaning

D．idea