—When is National Day?
—_________.
A:It's September 10th
B:It's March 12th
C:It's December 25th
D:It's October 1st
把两个标有“3.8V”字 样的小灯泡串联起来,接在如图所示的电路中.闭合开关,两个小灯泡都发光.若把一根导线接在小灯泡L2的两端,你所看到小灯泡的变化情况是:
如图是甲烷(CH4)分子两种结构模型,下列说法正确的是( )
—I've never seen a person with a better of art.