题目

已知“○”、“●”表示质子数不同的原子，下列表示的气体物质中，属于化合物的是（） 答案：BLong long ago, there was a large mountainside, where rested an eagle's nest with four large eagle eggs. One day 1. earthquake rocked the mountain, causing one of the eggs to roll down the mountain to a chicken farm 2. (locate) in the valley below. The chickens were kind enough to care for the eagle's egg, and an old hen volunteered to nurture (哺育) and raise the large egg.One day, the egg hatched and a beautiful eagle was born. Sadly, 3. , the eagle was raised to be a chicken. Soon, the eagle believed he was nothing more 4. a chicken. The eagle loved his present family, but his spirit cried out 5. more. While playing on the farm one day, the eagle happened to notice a group of mighty eagles soaring in the skies. "Oh," the eagle cried, "I wish I could soar like those birds."The chickens roared with 6. (laugh), “You cannot soar with those birds. You are a chicken and chickens do not soar."The eagle continued staring at his real family up above, 7. (dream) that he could be with them. Each time the eagle would let his dreams 8. (know), he was told it couldn't be done. That is 9. the eagle learned to believe. The eagle, after time, stopped dreaming and continued to live like a chicken. Finally, after a long life as a chicken, the eagle passed away.You become what you believe you are. So, if you ever dream of becoming an eagle, follow 10. dreams... not the words of a chicken.