A:peaceful
B:skilful
C:silent
D:calm
—Yes. My grandfather was one of them. He went there in his .
科技节活动中,化学实验小组做了如图实验,请回答以下问题.
设函数fx的定义域为实数集R,f2-x=fx,且当x≥1时,fx=log5x,则有( )
①甲、乙两个水杯中,盛有热水的是____;
②该实验说明分子热运动的剧烈程度与____有关.