题目

为探究二氧化碳能否和水反应，用四朵石蕊溶液染成紫色的干燥小花完成下图四个实验。实验I、Ⅳ中小花变红，实验Ⅱ、Ⅲ中小花不变色。下列说法不正确的是（ ）A. 实验Ⅰ、Ⅱ说明醋酸可以使小花变红B. 实验Ⅲ说明二氧化碳不能使小花变红C. 实验Ⅱ、Ⅲ、Ⅳ说明二氧化碳能与水发生化学反应D. 上述实验说明二氧化碳和醋酸具有相似的化学性质完成短文:根据首字母提示填空，使短文完整正确。(每空限填一 词) (共 10小题)I like traveling a lot and I hope to do more in the future. However, I ahways have one simple question: Why do we do it?This s1.vacation, many people traveled to the Forbidden City.People w2. in line to see the real palace in Beijing.Why are a lot of people spending so much time doing s3.a thing? Because traveling not only can be exciting and enjoyable, but also can be c4. if you want to learn something and do some "homework" first. A large number of v5. go to many famous places of interest every year. Sometimes traveling may let them down.For example, Stonchenge (巨石阵) is a circle of stones 3000 years ago. We still don't know how people b6. it. After traveling, you find you can learn n7., except touching the stones. But my first visit there was very great,because I did my "homework". I sudied it and read a lot of books. My travels b8.before I left.Once I arrived, I was ready to learn more and take part in more interesting a9.. All of these made my trip more meaningful.If you are p10. to travel next vacation, ask yourself: Am I going to learn anything?Am I just taking a trip, or am I traveling for a reason?