机动车在夜间道路上发生故障难以移动时要开启危险报警闪光灯、示廓灯、后位灯。
参考答案：对
She ____________ the path as the trees around her became thicker.
A．lost sight of
B．caught sight of
C．lost sight
D．caught sight
关于冻疮下述哪项或哪几项正确()
A．冻疮处皮肤为红斑、稍肿
B．多发生于冬季气温甚低而干燥的地区
C．冻疮温暖后患处痒痛
D．感染后可糜烂溃疡
E．未感染者愈合不留瘢痕
