电不分段锚段关节转换支柱处，两接触线间垂直、水平距离应符合设计要求，允许偏差±（）mm。
A.10
B.20
C.30
D.50
参考答案：B
It has been officially announced that the two countries will_________again. [ ]
A. turn up
B. team up
C. hold up
D. come up
影响拉伸取向的因素有哪些？
