摘要(Abstract)：

<正> Because plants cannot move or talk,most people think they have no feelings,they think they cannot receive signals from outside.But a plant knows about the sun and about gravity.If you put a plant in a dark corner,within a few hours it will be leaning towards the light.When you plant a seed in the ground,the root knows how to grow down and theshoot knows how to grow up.It knows because it knows about gravity.

关键词(KeyWords)：

Abstract:

Keywords:

基金项目(Foundation):

作者(Author):

参考文献(References)：