4同预测……以选择题的形式对酶的三个特性进行考查仍是今后高考的热点,预计高考试题可能会联系生产生活实践,以表格、曲线的形式考查对酶知识的理解和应用。解题思路……无催化剂时,H2O2在室温条件下会分解,只是分解速率很慢,A错误;相对反应速率随反应所需的相对活化能的升高而降低,不呈正相关,B错误;Fe3+和酶通过降低活化能加快反应速率,C错误;由表格可以得出酶具有高效性的特点,D正确。考答案……D

第二节书面表达My 18th BirthdayTurning 18 is a big milestone in my life, indicating that I am growing into an independent andresponsible adultOn this special occasion, I will arrange a family feast. Rather than keep my parents busy in thekitchen, I prefer to prepare the dinner on my own. While everyone is at table, I will surprise my parentswith a beautifully-decorated family album, in which photos of me growing up in their company areInciudeMy 18th birthday is meant for me to recall pleasant memories and also look ahead. I will takeadvantage of what life has to offer in the future

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