用化学用语填空：五氧化二氮分子____、碳酸钾____。

    Once there was an island where all the feelings lived: Happiness, Sadness, Knowledge, and all of the others, including Love. One day it was said that the island would go down, so all made boats and left except Love.
Love was the only one who stayed. Love wanted to offer her help until the last possible moment. When the island had almost gone down, Love decided to ask for help.
      Richness was passing by Love in a great boat. Love said, “Richness, can you take me with you?” Richness answered, “No, I can't. There is a lot of gold and silver in my boat. There is no place here for you.”
       Sadness was close by, so Love asked, “Sadness, let me go with you .” “Oh, Love, I am so sad that I need to be by myself!”
Happiness passed by Love, too, but she was so happy that she did not even notice when Love called her.
Suddenly, there was a voice, “Come, Love, I will take you.” It was an elder. Love was so excited that she even forgot to ask who the elder was. So Love asked Knowledge, another elder, “Who helped me?” “It was Time,” Knowledge answered. “Time?” asked Love. “But why did Time help me?”
      Knowledge smiled with deep wisdom and answered, “Because only Time understands how valuable Love is.”

开学后，七（5）班召开了“我爱我家”的主题班会，师生畅谈学校的温暖、和谐温馨的集体……下列让你感到集体温暖的是（    ）

    I have a friend. His name is Jack. ③He is healthy because(因为) he plays sports. He runs every day. He runs to his ___①____ in the morning and he runs ____②____ after school in the afternoon. He can run fast. He likes playing soccer, volleyball, tennis, basketball , ping-pong and more. He has three soccer balls, two volleyballs, six tennis rackets, four basketballs and many ping-pong balls. They are in his room. He plays sports with his friends every day. He likes many sports stars and he often watches them on TV. All my classmates say Jack is sporty (爱好体育)。