北美自由贸易区的成立时间是()
A.1994
B.1995
C.1996
D.1997
参考答案:A
Chinese are very friendly ___ you.[ ]
A. to
B. for
C. on
D. in
道岔区轨枕埋入式无砟轨道底座混凝土裂缝不得大于(),不得有竖向贯通裂缝。
A.0.1mm
B.0.2mm
C.0.3mm
D.0.4mm