蓄电池工作的过程是物理变化过程（）
参考答案：错
The policeman asked the child _____ so that he could take him home. [ ]
A. where did he live
B. where he lived
C. how he lived
在新建住宅区，未设垃圾管道的多层住宅一般每( )设一个垃圾收集点。
A．3幢 B．4幢 C．5幢 D．8幢
