They decided _____ at the end of this month. [ ]
A. to leave
B. going back
C. travel
答案:A
软组织损伤的体征可有()
A.压痛
B.肿胀
C.发绀
D.抽屉试验阳性
E.直腿抬高试验阳性
卸车时,必须在卸车点朝火车送车方向()米处设臵防护信号牌。
A.50
B.25
C.30
D.2