题型：问答题 简答题 打雷闪电时，空气中有极少量的氧气会转变为臭氧，氧气→臭氧，以下说法正确的是 [ ]A．该变化是物理变化 B．该变化是化学变化 C．该变化属于分解反应 D．该变化属于化合反应 查看答案
题型：问答题 简答题 写作。 Teenagers杂志Conversation With Brad栏目的负责人Brad收到了李华的一封来信。仔细阅读下面的来信，帮助Brad用英语写一封回信，给出分析并提出合理建议。 Dear Brad, I'm a student from Xinhua Senior High School. I have some difficulty communicating with my parents. Although I have tried my best, I find it really difficult to make them satisfied... So I feel lonelysometimes. I would be grateful if you could give me some advice. Yours, Li Hua 注意：1. 可适当增加细节。 2. 词数：120-150。 Dear Li Hua, I feel greatly honored to be trusted with your personal affairs. _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________ Yours sincerely, Brad 查看答案