现场气压焊在对轨前先将长轨条调整到适合焊接的位置，一般称为（）。
A.串轨
B.拨轨
C.垫轨
D.调整轨缝
参考答案：A
If your composition by the end of this week is delayed, you’re sure to lose some points from your final result.
A．to be finished
B．is finished
C．will have been finished
D．finishing
厚角组织具有不均匀加厚的次生壁。( )
