亲爱的同学们，进入初中了，一切是那么地新鲜、那么地好奇，新环境、新同学、新集体、新体验，给了我们新的憧憬。为了加强同学们的互相了解，促进同学们之间的友谊，共创优秀班集体，七年级（1）班准备开一次主题班会。假如你是该班同学，请你完成下列任务：

阅读理解

    Hello, my name is Amy. I get up at six forty. I have breakfast at 7:10. And then I go to school. I have four classes in the morning and two classes in the afternoon. I have lunch in the canteen at school. I go home at four fifty. I have dinner at seven o'clock. I go to bed at nine thirty.

食用米饭、馒头，主要为人体补充的营养素是（  ）