教学关系是静态的、固定的。
参考答案:错
Chinadaily. com. cn is the largest English portal site in China, news,business information and learning materials.
A.to provide
B.provide
C.provided
D.providing
在建造房屋时,墙脚(即房屋基础)比墙要宽一些,这是为了减小房屋对地面的______.