拉壳钩
参考答案:
枪机借助火药气体作用后退时,抓住弹壳底缘抽出弹壳的另件。
You are running into danger,().
A.shallow water ahead of you
B.submerged wreck ahead of you
C.risk of collision imminent
D.A, B, C are all right
属于强迫行为的是()
A.强迫检查
B.强迫询问
C.强迫洗手
D.强迫回忆
E.强迫计数