如图是小麦淀粉酶在不同温度条件下的催化效率变化曲线，请据图回

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问题读图填空题

如图是小麦淀粉酶在不同温度条件下的催化效率变化曲线，请据图回答：

(1)由图A可知，在_____℃时，小麦淀粉酶的催化效率最高。

(2)由图A和图B可知，在_____℃和_____℃时，催化效率都降为0；但在_____图中，随温度上升，酶催化效率可以恢复；而在另一图中，温度变化后，催化效率不再上升，这表明______________________。

答案

(1)35

(2)0 100 A 低温使酶的活性降低，温度过高会破坏酶分子的结构，从而使酶失去活性

阅读理解

My name is Christine and I’d like to tell you how I learned English.

Here in Brazil we started to have English classes in high school. When I finished school, I wasn’t good at English. But later, I found it interesting to listen to English songs and watch English films. So I decided to study English at Fisk School when I was thirty-five years old. I had class with sixty teenagers in a big classroom at that time. Because I had to look after my son, I stopped studying at the school after seven months. But I kept studying by myself. I learned by listening to English songs and watching films. When I had problems, I tried to find answers on the Inernet. During that time, my friends helped me a lot.

Now, I have no problem in speaking or reading. Most people are surprised when I speak in English.

根据短文内容，选择正确答案。

小题1:Where is Christine from?

A．America.

B．China

C．Brazil

D．Japan.小题2:When did Christine start studying at Fisk School?

A．When she finished school

B．When she was thirty-five years old.

C．When she was in high-school

D．When she had her son.小题3:How long did Christine study English at Fisk School?

A．For seven weeks.