—____ do you celebrate the Mid-Autumn Festival?
—We enjoy the full moon and eat moon cakes.
A:What
B:When
C:Which
D:How
如图所示,开关S与直流恒定电源接通时,L1、L2两灯泡的亮度相同,若将S与交变电源接通( )
按图中所标要求组装好的以下Ⅰ~Ⅲ装置,搁置一段时间后,观察所产生的现象,下列有关叙述正确的是()Ⅰ Ⅱ Ⅲ
寒冷的冬天,法国梧桐纷纷落叶,松树却依然郁郁葱葱,这表明了( )