题目

When we visit another country, differences in music and dance are   36   some of the first things that we notice. Every culture has   37   its own types of music and dance, which are very different from those of other societies.    Each type of music usually has a distinctive rhythm and a special sound,   38   on the kinds of instruments that are used to produce it. The most common type of instruments are   39   instruments, such as guitars and violins; wind instruments, including horns and flutes. Many different kinds of musical sounds   40   be created by using differen电解水的实验不能够说明的问题是（ ）A．水分子间有间隔B．水由氢元素和氧元素组成C．水能发生分解反应D．电解水产生的两种气体体积比是定值