处于发车状态的应答器维持原有的限速报文,这种现象发生在列控中心与计算机联锁通信中断的情况下
参考答案:对
— Wow! Jerry got full marks again! How lucky he is!
— Not exactly! _______. He makes full use of his time to study. [ ]
A. He is more lucky than hardworking
B. He is not so much lucky as hardworking
C. He is far less hard working than lucky
D. His classmates are no more hard working than he
针对广义痕迹叙述正确的是()
A、是痕迹学研究的主要对象
B、根据痕迹的有无、痕迹的分布状况、痕迹的形态、痕迹间的相互关系,有助于判明现象真伪
C、当事方的行为活动所引起的交通事故现场一切物质形态的种种变化。
D、表面形态的改变是广义痕迹