在行驶的卡车内，看到吊饰向前摆动，卡车应在 ____（选填“加速”、“减速”或“匀速”）行驶．当卡车速度计指针如图所示时，车速为 ____km/h；按此速度匀速速行驶360km，所需时间为 ____

富豪所从事行业的变化是经济发展变化的标志。《史记·货殖列传》排列从春秋到汉武帝时代众多的豪民巨富，战国和汉代炼铁行业出富豪最多，汉代就有卓氏、程郑、孔氏、曹邴氏四家列入富豪榜。这表明（    ）

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.

青蒿素能有效治疗疟疾，其化学式C₁₅H₂₃O₅，下列说法正确的是（  ）