A lot of things ________ by people to save the little girl now.
A:are doing
B:are being done
C:has been done
D:will be done
如图,现在甲、乙、丙三家公司共建一个污水处理站,使得该站到乙、丙两家公司的距离相等,且使甲公司到污水处理站P的距离最短,试在图中确定污水处理站P的位置.(要求尺规作图,保留作图痕迹,不写作法,但要写结论)
下列各句没有语病的一句是( )