精品解析：河南省郑州市航空港区2023-2024学年九年级上学期期末英语试题

河南省郑州市航空港区2023-2024学年九年级上学期期末英语试卷（解析版） 二、阅读理解 阅读下面四篇语言材料,然后按文中要求做题。 Chemical reactions（反应） make for some great experiments. You can make use of the CO2 (carbon dioxide) given off by a baking soda（小苏打）and vinegar reaction to blow up your balloon! What you’ll need ★ Balloon ★ About 40 ml of water ★ Soft drink bottle ★ Vinegar ★ A teaspoon of baking soda Instructions ★ Before you begin make sure that you pull the balloon long to make it as easy as possible to blow up. ★ Put the 40 ml of water into the soft drink bottle ★ Add the baking soda and mix it with water ★ Put the vinegar in and quickly put the balloon over the mouth of the bottle. What’s happening? If all goes well, then your balloon should inflate! Adding the vinegar to the baking soda creates a chemical reaction. The baking soda is a base, while the vinegar is an acid. When the two combine（结合）, they create CO2. The gas rises up and escapes through the soft drink bottle. However, it doesn’t escape the balloon, pushing it outwards and blowing it up. 1. What does a baking soda and vinegar reaction give off? A. O2 B. O3 C. CO2 D. H2O 2. What should you do before you begin? A. Heat the water. B. Drink some juice. C. Blow up the balloon. D. Pull the balloon long. 3. What does the underlined word “inflate” mean in Chinese? A. 涨价 B. 膨胀 C. 吹捧 D. 抬高 4. What can be used instead of vinegar? A. Milk. B. Water. C. Tea. D. Lemon juice. 5. The text is about ________. A. an experiment B. a game C. a film D. a book Two years ago, I was sitting in my car waiting in a long line for a toll (通行费) station. When I finally reached the station, the toll station worker told me that the person in front had paid for me and I was free to go. I was so shocked. I didn’t need to save the 5 dollars. I would never know who he was. I was tired by the heavy traffic and the long line, and that behavior was surprising and unbelievable, which really touched my heart. So I decided to pay for the next car waiting in line. The first time I trie