A:东高西低
B:南高北低
C:西高东低
D:北高南低
在如图所示的电路中,开关S闭合时,电灯L1和L2是____联的,断开开关S,电流表的示数____(选填“变大”、“变小”或“不变”).
__________Lei Feng is no longer living, his spirit lives on today.
如图所示.在放大的测力计表盘中画出此时指针位置.