2SO₂（g）+O₂（g）⇌2SO₃（g）反应过程的能量变化如图所示．已知1mol SO₂（g）氧化为1molSO₃（g）的△H=﹣99kJ/mol．

请回答下列问题：

根据短文内容，选择正确答案。
D
    John sent for a doctor because his wife was ill. He called the doctor and made sure they would meet at five. He arrived at the doctor's at twenty to five. He thought. “It s a little bit earlier. I'll wait for a moment. It's good to keep the time. ”
    Then he stopped his car in front of the doctor's. He looked around and saw a noisy square not far from here. He went there and sat down on a chair to enjoy the last light of afternoon sun and make himself quiet. He saw some children playing and some women talking to each other happily.
    Suddenly he heard a girl crying. He came up to her and asked some questions. Then he knew she got lost. John tried to find out her address and took her home. The girl's parents were very thankful.
    Then John hurried to the doctor's. The doctor said angrily when he saw him “You're late. Why did you keep me waiting for 20 minutes?" John said nothing but one word "Sorry!”

人与自然的和谐统一是人类发展的追求之一。根据提示，完成下列探究学习。

（一）、走进人与自然和谐历史
  
（1）图一图二是我国原始居民适应自然、征服自然的结果。图一的房屋名称叫什么？ 居住图二房屋的原始居民叫什么？ 导致这两种不同房屋结构的主要因素是什么？
（二）、认识人与自然和谐事例
“……滔滔的洪水淹没了农田，冲倒了房屋，害得老百姓无家可归。他带领老百姓挖通了九条大河，劈开了九座大山，引导洪水流入了大海。他在外治水13年，曾经三次路过自己的家门，但他一次也没有进去看一看。”
——苏教版第三册课文
（2）阅读上述材料说出远古时期人类为了生存，改造自然的成功事例是什么？
（3）欣赏下图说出战国时期协调人与自然和谐发展的成功典范又是什么？

（4）战国时期，谁提出了不要过分捕捞鱼鳖，要按时令进山伐树的主张？
（三）、感悟人与自然和谐发展
（5）有和谐就有不和谐。请说出现实中人与自然不和谐发展的事例两个。
（6）反思古人的做法与主张，在人与自然和谐发展的问题上，作为一名当代中学生应该么做？

我国科举制正式诞生是在（     ）

生活中遇到下列问题，不涉及到化学变化的是       （   ）