学习目标：
1.根据音标熟读单词 2.根据自学提示，自学单词并在课本上做好笔记。
3.分三部分熟练记忆和应用第一单元单词。
自学指导与点拨升华：
1.million, millions of , 5 million
hundred, 百thousand, 千 million, 百万 billion， 十亿
1)I can see m________________ of stars in the sky at night.
2)What would you do if you had 5 m_____________________ dollars?
