铅主要蓄积在（）
A.肾脏
B.肝脏
C.肺脏
D.脾脏
E.骨骼
参考答案：E
For a moment nothing happened. Then all shouting together.
A．voices had come
B．came voices
C．voices would come
D．did voices come
磁性载体档案库房在24小时内温度变化不得超过（）。
A、±2℃
B、±3℃
C、±4℃
D、±5℃
