弹条V型扣件系统由()等组成,此外,为高低调整需要,还包括调高垫板。
A.螺旋道钉
B.平垫圈、弹条
C.轨距挡板
D.轨下垫板和预埋套管
参考答案:A, B, C, D
Bill __________ his wife that he ________ when the fire broke out.
A.tells, is sleeping
B.told, was sleeping
C.told, slept
D.had told, had slept
烈士公祭仪式的程序是如何进行的?