计算：111011₂÷101₂=

完形填空题

     My family members like to use computers. We live in China. My aunt1in Australia. My mother and my aunt often2e-mails to each other. Sometimes3chat(聊天) online.

     My father is a4in a middle school. He often searches for5for his lessons6the Internet.

     My brother and I like to7computer games. I like to play Counter Strike, but he likes to play Seer(赛尔号). My8don't like us to play them too long. They say that playing computer games too long is bad for our9and study. We both like music, too. So sometimes we10music on the computer.

西周时期，周王对墓葬用品的规定严格，如：用鼎制度就明确规定为“天子九鼎，诸侯七鼎，大夫五鼎，元士三鼎或一鼎”。材料反映的本质问题是(         )