焦罐台车位置检测器保证焦罐台车对位精度控制在（）内，经APS对位装置夹紧对位，精度可达（），满足提升机升降对位的需要。
参考答案：±100mm；±10mm
上海证券交易所有创业板市场。（）
He _____ our school for two weeks. [ ]
A. left
B. has left
C. has been away from
D. has been left
