1. 苹果的质量占所有水果总质量的$\frac{2}{5}$，是把（）看作单位“1”。

材料分析题：

材料一：冯艾两次参加西部偏远山区义务支教活动，她和成千上万的志愿者一样，立志用自己的一份力量去努力改变那里的贫穷和落后。他们的身上都传递着一种精神的力量，这种精神的力量使他们在工作中充满激情和活力，更加勤勉务实而且富于创造，在遇到困难和挫折的时候，更加坚定和豁达、乐观向上，他们用自己的行动实践着“奉献、友爱、互助、进步”的志愿者精神。

材料二：“有一种生活，你没有经历过，就不知道其中的艰辛；有一种坚信，你没有体会过，就不知道其中的快乐；有一种快乐，你没于拥有过，就不知道其中的纯粹。”  —— 摘自冯艾日记

    I'm Peter. There are four people in my family. They are my father, my mother, my grandfather and me. I'm twelve. My birthday is on 15th March. My parents are both doctors. They help people. Their birthdays are both in May. My grandfather is old. He is sixty-five. His birthday is on 9th June. He likes reading. I like reading too. I want to be a teacher in the future. I want to teach Chinese in a school.