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.

达尔文的生物进化学说目前普遍被人们所接受，其学说的核心内容是（　　）

填上适当的单位或数值．

（1）在高速公路上行驶的汽车速度为30 ____　；

（2）人的头发直径约为70　 ____　；

（3）声音在一个标准大气压（15℃）下的传播速度是 ____　m/s．

用手指去触摸0℃的水和0℃的冰时，下列说法中正确的是（）