机器是由许多构件装配成整体的，构件是机器中运动的单元。
参考答案：对
句型转换。
1. Math is my favorite subject.(同义句)
I ______ math ______.
2. She loved playing soccer when she was ten.(划线部分提问)
______ did she ______ when she was ten.
3. Turn out the light.(否定句)
______ ______ out the light.
信息高速公路是指( )。
A．因特网 B．国家信息基础结构C．智能化高速公路建设 D．高速公路的信息化建设
