隐身技术
参考答案:
是通过降低武器装备等目标的信号特征,使其难以被发现、识别、跟踪和攻击的综合性技术。
--- Why are you so late?
--- I got stuck in the traffic jam, or I earlier.
A.arrived
B.had arrived
C.would arrive
D.would have arrived[
很多化学反应都在溶液中进行,这是因为______________。