作为生物催化剂的酶与无机催化剂不同的特点是:(1)()、(2)()(3)()(4)()。
参考答案:催化效率高,专一性强,酶易失活,酶活力的可调性
阅读理解。根据短文内容,判断正(T)误(F)。
I am an English girl. My name is Mary. I'm twelve. My dad and mom are English teachers. I have a
sister. Her name is Ann and she is twelve years old, too. We are in China now. Ann and I study (学习) in
Beijing No. 4 Junior High School. We are in the same grade, but in different classes. Ann has a cat. It
looks nice. It has a small mouth and two small ears. It is white. We have friends here. They're good.
( ) 1. Mary is from the U.S.A.
( ) 2. Ann is in Beijing No. 4 Junior High School.
( ) 3. Ann and Mary have good friends in China.
( ) 4. Ann has a black cat.
( ) 5. They are in the same class.
阅读下列两个相关材料。 材料1:教科书“二氧化碳的性质”的部分呈现内容: 二氧化碳溶于水的过程中,有没有发生化学变化呢 取四朵用石蕊溶液染成紫色的干燥的小花。第一朵小花喷上稀醋酸,第二朵小花喷上水,第三朵小花直接放入装满二氧化碳的集气瓶中,第四朵小花喷上水后,再放入装满二氧化碳的集气瓶中,观察四朵花的颜色变化。 材料2:化学课程标准的内容标准。 内容标准:知道二氧化碳的主要性质和用途 活动与探究建议:实验探究二氧化碳的性质。 试根据以上材料,就“二氧化碳与水反应的过程”的片段内容,回答下列有关问题:
设计本片段的三维教学目标。