题目内容

关于酶促反应特点的叙述,正确的是

A. 酶对底物无选择性
B. 酶的活性不受任何因素的调节
C. 酶的活性稳定
D. 与一般催化剂催化效率类似
E. 酶的活性不稳定,易受温度及酸碱度等因素影响

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Task One： People are talking about machines andappliances. Listen to match the productsin the first groupwith the features in the second group.

TaskTwo: Listen to it again. Are these statements true or false? checkthe correct answer (判断题和连线题使用了同一个音频，请先做连线题）.Youshouldn't put it near a window.

A. 对
B. 错

You should keep it outside the case when you carry it.

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B. 错

Youshould open the doors when you use it.

A. 对
B. 错