升降台安装在什么地方？作用是什么？
参考答案：
升降台一般安装在二辊叠轧薄板、三辊型钢轧机和三辊劳特式中板轧机的前后，根据轧制需要升降轧件。
The writer ______ the old folk story with his own imagination and wrote a new story.
A．performed
B．impressed
C．combined
D．represented
立卷
