图甲是H₂O₂酶活性受pH的影响，图乙表示在最适温度下,pH =b时H₂O₂分解产生的O₂量随时间的变化。若该酶促反应过程中改变某一初始条件，以下改变正确的是（ ）

给下面的字选择正确的读音。

踮____diǎn diàn    株____zhū zū    栽____zāi zhāi

浓____lónɡ nónɡ    伸____shēn shēnɡ   眨____zǎ zhǎ

疲____pí qí    倦____jüàn juàn

    Little Red Riding Hood lives near a forest (森林). She often goes to visit her grandma. She usually brings her some food. One day, when she is on her way to her grandma's home, a wolf sees her. The wolf stops her and asks, “Where are you going?” “My grandma's home.” answers Little Red Riding Hood. The wolf suggests (建议）picking some flowers for her grandma. The wolf runs to her grandma's home first. He eats the grandma. He is lying (躺）in the grandma's bed. Little Red Riding Hood comes and the wolf wants to eat her. Little Red Riding Hood cries for help. A hunter (猎人）comes quickly. The wolf is afraid, and he runs away.

【提出问题】过氧化钠与水反应生成了什么物质？为什么脱脂棉会燃烧？

【猜想】①可能有一种气体和另一种物质生成；②反应过程中可能有热量放出．

【实验装置】如图所示