问题
单项选择题
下列不是影响酶活性因素的是（）
A.水的用量
B.表面活性剂
C.酸碱度
D.温度
答案
参考答案：A
解析：
影响酶活性的因素有温度、PH值、表面活性剂等，但是水不会影响酶的活性，故选择A。
考点：本题考查影响酶活性因素的相关知识，意在考查考生理解所学知识的要点，把握知识间的内在联系的能力。
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下列不是影响酶活性因素的是（）
A.水的用量
B.表面活性剂
C.酸碱度
D.温度
参考答案：A
解析：
影响酶活性的因素有温度、PH值、表面活性剂等，但是水不会影响酶的活性，故选择A。
考点：本题考查影响酶活性因素的相关知识，意在考查考生理解所学知识的要点，把握知识间的内在联系的能力。
Elizabeth lived with her six children in a small house. One winter, there was a big flood(洪水) ,and quite a few houses were washed away, but Elizabeth’s house was high enough to escape it. Elizabeth helped one of the families which had lost everything. She shared her home until the family could build a new house. Elizabeth’s friends could not understand her since she already had so many children to take care. "Well," Elizabeth explained to her friends, at the end of World War II, there was a poor woman in a town in England .Her husband had been killed in the war and she had a lot of children, just like me now .The day before Christmas, this woman said to her children, “We won’t be able to have much for Christmas. I’m going to get just one present for us all .Now I’ll go and get it. She came back with a little girl who had no parents .Here’s our present, she said to her own children. The children were more than excited to get such a present. They welcomed the little girl warmly, and she grow up as their sister. I was that Christmas present."
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