题目

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。You guys will do great. I love you. I looked up at my mom, and she smiled at me. But I didn't want to getout of the car. The car door opened, and my sister jumped out. I knew I was supposedto follow her, but I was stuck in my seat. My sister was running towards the schooland looked back quickly, keeping going. I kept looking at the door, hoping she wouldcome back out and get me. She didn't come back. My mom had told me that my sister would show me where to go. The daybefore, I had pic下列图示实验所得出的结论中，错误的是(     )A                  B                   C                   DA．氧气约占空气体积的1/5B．二氧化碳的密度比空气大，不燃烧也不支持燃烧C．反应前后天平示数不相等，说明该反应不遵守质量守恒定律D．燃烧条件之一是温度需达到可燃物的着火点