She likes tennis and she thinks it's ______ of all sports.
A:interesting
B:more interesting
C: most interesting
D:the most interesting
红苋菜细胞的液泡中含有呈紫红色的花青素。将红苋菜的叶片切成小块后放入水中,水的颜色无明显变化。若进行加热,随着水温升高,水的颜色逐渐变红。其原因是( )
化能合成作用是指自然界中少数种类的细菌,能够利用体外环境的某些无机物氧化时所释放的____来制造____.