课文中:星星辨别方向,云预兆天气,石灰石观察历史,花岗石地质变迁.
课外:树的年轮可以辨别方向,密的那一方是北方
猜你喜欢
- 1在下列命题中:1、若z1、z2∈C,且z1与z2互为共轭复数,则z1-z2为纯虚数; 2、若z1、z2∈C,则
- 2does underground leave what the time ? (连词成句)
- 3在给标本染色时,将碘液滴在____________,用_______从____吸引,使染液浸润标本全
- 4英语翻译
- 5There is a ____ building next to the bookstore.
- 6吕游为什么说 黄果树瀑布是大自然献给人类的一幅惊人的杰作
- 7帮我解释一下这句英语句子,谢谢.
- 8英语翻译
- 9Tom is a bus driver.He is a good young man and l____1____ his work very much.One day,when he was
- 10如果m(x-1)=2001-n(x-2),x可以为仍以值,则m的2001次方+n的2001次方=?