氰化氢中毒：主要抑制( )

A．细胞呼吸酶活性
B．血红素合成酶活性
C．细胞色素氧化酶活性
D．胆碱酯酶活性
E．过氧化氢酶活性

书面表达

     假设你是本刊读者Jack，请你根据所给的背景材料给Peter写封回信.内容包括：

1.分析Peter父母不同意的理由；

2.你给Peter的具体建议。

背景材料：

Teenagers          总228(4/2011)期

编者按:本期刊登了Peter的来信,欢迎读者就信中谈到的问题进行分析并提出建议.

Editor,

     I'm a boy of 18. I like arts, especially dancing. I want to attend a hip-hop(街舞) training course on the weekend, but my parents don't permit me to. I'm very upset and need your advice.

                                                                                                                                                        Peter

注意:字数100左右.文章的开头已经给出,不计入总字数.Peter,

     You are very upset that your parents don't permit you to attend a hip-hop training course on the

weekend._______________________________________________________________________________________________________________________________________________________.

                                                                                                                                                      Yours,

                                                                                                                                                       Jack