A mechanic opening a door without obeying the specified safety precautions can easily cause injury to persons standing near the door( )
A.When opening a door, the mechanic not obey the specified safety precautions can easily cause injury to persons standing near the door B.Opening a door can easily cause injury to persons standing near the door, the mechanic not follow the specified safety precautions C.A mechanic opening a door without follow the specified safety precautions can easily cause injury to persons standing near the door正确答案A
